[Bleeding] Return correct drops for Cocoa blocks. Fixes BUKKIT-5159

For Cocoa Blocks, Block.getDropType() returns the item form of the Cocoa
block, rather than the Cocoa Bean item. Because of this, Cocoa blocks need
to have explicit handling in order to return the proper drop contents.

src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java

@@ -6,6 +6,7 @@ import java.util.Collections;
 import java.util.List;
 
 import net.minecraft.server.BiomeBase;
+import net.minecraft.server.BlockCocoa;
 import net.minecraft.server.BlockRedstoneWire;
 import net.minecraft.server.Blocks;
 import net.minecraft.server.EnumSkyBlock;
@@ -428,6 +429,12 @@ public class CraftBlock implements Block {
                         }
 
                         drops.add(CraftItemStack.asBukkitCopy(nmsStack));
+                        // We don't want to drop cocoa blocks, we want to drop cocoa beans.
+                    } else if (Blocks.COCOA == block) {
+                        int dropAmount = (BlockCocoa.c(data) >= 2 ? 3 : 1);
+                        for (int j = 0; j < dropAmount; ++j) {
+                            drops.add(new ItemStack(Material.INK_SACK, 1, (short) 3));
+                        }
                     } else {
                         drops.add(new ItemStack(org.bukkit.craftbukkit.util.CraftMagicNumbers.getMaterial(item), 1, (short) block.getDropData(data)));
                     }