SPIGOT-4455: ChunkData.getType returns legacy material

By: md_5 <git@md-5.net>

paper-server/src/main/java/org/bukkit/craftbukkit/generator/CraftChunkData.java

@@ -67,7 +67,7 @@ public final class CraftChunkData implements ChunkGenerator.ChunkData {
 
     @Override
     public Material getType(int x, int y, int z) {
-        return getTypeAndData(x, y, z).getItemType();
+        return CraftMagicNumbers.getMaterial(getTypeId(x, y, z).getBlock());
     }
 
     @Override

paper-server/src/test/java/org/bukkit/craftbukkit/generator/ChunkDataTest.java

@@ -13,7 +13,7 @@ public class ChunkDataTest extends AbstractTestingBase {
 
     private boolean testSetBlock(CraftChunkData data, int x, int y, int z, BlockData type, BlockData expected) {
         data.setBlock(x, y, z, type);
-        return expected.equals(data.getBlockData(x, y, z));
+        return expected.equals(data.getBlockData(x, y, z)) && expected.getMaterial().equals(data.getType(x, y, z));
     }
 
     private void testSetRegion(CraftChunkData data, int minx, int miny, int minz, int maxx, int maxy, int maxz, BlockData type) {