SPIGOT-276: Force load chunks in Location2D fixes /spreadplayers

nms-patches/Location2D.patch

@@ -0,0 +1,32 @@
+--- ../work/decompile-8eb82bde//net/minecraft/server/Location2D.java	2014-12-26 21:29:07.829484981 +0000
++++ src/main/java/net/minecraft/server/Location2D.java	2014-12-26 21:29:07.829484981 +0000
+@@ -68,7 +68,7 @@
+             }
+ 
+             blockposition = blockposition.down();
+-        } while (world.getType(blockposition).getBlock().getMaterial() == Material.AIR);
++        } while (getType(world, blockposition).getBlock().getMaterial() == Material.AIR); // CraftBukkit
+ 
+         return blockposition.getY() + 1;
+     }
+@@ -84,7 +84,7 @@
+             }
+ 
+             blockposition = blockposition.down();
+-            material = world.getType(blockposition).getBlock().getMaterial();
++            material = getType(world, blockposition).getBlock().getMaterial(); // CraftBukkit
+         } while (material == Material.AIR);
+ 
+         return !material.isLiquid() && material != Material.FIRE;
+@@ -94,4 +94,11 @@
+         this.a = MathHelper.a(random, d0, d2);
+         this.b = MathHelper.a(random, d1, d3);
+     }
++
++    // CraftBukkit start - add a version of getType which force loads chunks
++    private static IBlockData getType(World world, BlockPosition position) {
++        ((ChunkProviderServer) world.chunkProvider).getChunkAt(position.getX() >> 4, position.getZ() >> 4);
++        return world.getType(position);
++    }
++    // CraftBukkit end
+ }