Bunch of changes to help masks

worldedit-bukkit/src/main/java/com/boydti/fawe/bukkit/adapter/mc1_14/BukkitGetBlocks_1_14.java

@@ -609,6 +609,10 @@ public class BukkitGetBlocks_1_14 extends CharGetBlocks {
                                 } else {
                                     ordinal = adapter.adaptToChar(ibd);
                                 }
+                                // Don't read "empty".
+                                if (ordinal == 0) {
+                                    ordinal = 1;
+                                }
                                 paletteToBlockChars[paletteVal] = ordinal;
                             }
                             data[i] = ordinal;
@@ -636,10 +640,18 @@ public class BukkitGetBlocks_1_14 extends CharGetBlocks {
                                 val = ordinal(palette.a(i), adapter);
                                 paletteToOrdinal[i] = val;
                             }
+                            // Don't read "empty".
+                            if (val == 0) {
+                                val = 1;
+                            }
                             data[i] = val;
                         }
                     } else {
                         char ordinal = ordinal(palette.a(0), adapter);
+                        // Don't read "empty".
+                        if (ordinal == 0) {
+                            ordinal = 1;
+                        }
                         Arrays.fill(data, ordinal);
                     }
                 } finally {

worldedit-bukkit/src/main/java/com/boydti/fawe/bukkit/adapter/mc1_15_2/BukkitGetBlocks_1_15_2.java

@@ -629,6 +629,10 @@ public class BukkitGetBlocks_1_15_2 extends CharGetBlocks {
                                 }
                                 paletteToBlockChars[paletteVal] = ordinal;
                             }
+                            // Don't read "empty".
+                            if (ordinal == 0) {
+                                ordinal = 1;
+                            }
                             data[i] = ordinal;
                         }
                     } finally {
@@ -654,10 +658,18 @@ public class BukkitGetBlocks_1_15_2 extends CharGetBlocks {
                                 val = ordinal(palette.a(i), adapter);
                                 paletteToOrdinal[i] = val;
                             }
+                            // Don't read "empty".
+                            if (val == 0) {
+                                val = 1;
+                            }
                             data[i] = val;
                         }
                     } else {
                         char ordinal = ordinal(palette.a(0), adapter);
+                        // Don't read "empty".
+                        if (ordinal == 0) {
+                            ordinal = 1;
+                        }
                         Arrays.fill(data, ordinal);
                     }
                 } finally {

worldedit-bukkit/src/main/java/com/boydti/fawe/bukkit/adapter/mc1_16_1/BukkitGetBlocks_1_16_1.java

@@ -600,6 +600,10 @@ public class BukkitGetBlocks_1_16_1 extends CharGetBlocks {
                                 }
                                 paletteToBlockChars[paletteVal] = ordinal;
                             }
+                            // Don't read "empty".
+                            if (ordinal == 0) {
+                                ordinal = 1;
+                            }
                             data[i] = ordinal;
                         }
                     } finally {
@@ -625,10 +629,18 @@ public class BukkitGetBlocks_1_16_1 extends CharGetBlocks {
                                 val = ordinal(palette.a(i), adapter);
                                 paletteToOrdinal[i] = val;
                             }
+                            // Don't read "empty".
+                            if (val == 0) {
+                                val = 1;
+                            }
                             data[i] = val;
                         }
                     } else {
                         char ordinal = ordinal(palette.a(0), adapter);
+                        // Don't read "empty".
+                        if (ordinal == 0) {
+                            ordinal = 1;
+                        }
                         Arrays.fill(data, ordinal);
                     }
                 } finally {

worldedit-core/src/main/java/com/boydti/fawe/beta/implementation/blocks/CharGetBlocks.java

@@ -27,7 +27,7 @@ public abstract class CharGetBlocks extends CharBlocks implements IChunkGet {
 
     public char[] update(int layer, char[] data) {
         if (data == null) {
-            return new char[4096];
+            data = new char[4096];
         }
         Arrays.fill(data, (char) 1);
         return data;

worldedit-core/src/main/java/com/sk89q/worldedit/function/mask/BlockMask.java

@@ -184,7 +184,7 @@ public class BlockMask extends ABlockMask {
     }
     @Override
     public boolean test(BlockState state) {
-        return ordinals[state.getOrdinal()];
+        return ordinals[state.getOrdinal()] || replacesAir() && state.getOrdinal() <= 3;
     }
 
     @Override

worldedit-core/src/main/java/com/sk89q/worldedit/function/mask/InverseSingleBlockStateMask.java

@@ -3,10 +3,10 @@ package com.sk89q.worldedit.function.mask;
 import com.sk89q.worldedit.extent.Extent;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.world.block.BlockState;
-import com.sk89q.worldedit.world.block.BlockStateHolder;
 
 public class InverseSingleBlockStateMask extends ABlockMask {
     private final char ordinal;
+    private final boolean isAir;
 
     public BlockState getBlockState() {
         return BlockState.getFromOrdinal(ordinal);
@@ -14,17 +14,26 @@ public class InverseSingleBlockStateMask extends ABlockMask {
 
     public InverseSingleBlockStateMask(Extent extent, BlockState state) {
         super(extent);
+        isAir = state.isAir();
         this.ordinal = state.getOrdinalChar();
     }
 
     @Override
     public boolean test(Extent extent, BlockVector3 vector) {
-        return ordinal != vector.getOrdinal(extent);
+        int test = vector.getOrdinal(extent);
+        if (isAir && test == 0) {
+            return false;
+        }
+        return ordinal != test;
     }
 
     @Override
     public final boolean test(BlockState state) {
-        return state.getOrdinalChar() != ordinal;
+        int test = state.getOrdinalChar();
+        if (isAir && test == 0) {
+            return false;
+        }
+        return test != ordinal;
     }
 
     @Override