Fix boats/minecarts not dropping when destroyed

Diff to clone the item was lost, which meant that the spawned
item was air.

patches/server/0902-Restore-vanilla-entity-drops-behavior.patch

@@ -37,7 +37,7 @@ index 419fcb4cd97cf10a2601e02024b999a51a0ff952..df21cd1bd2a3dda7169edbea18bbfdf0
          loot.addAll(this.drops);
          this.drops.clear(); // SPIGOT-5188: make sure to clear
 diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
-index 1d66c35b1092b8101f0a803d8c087e5a958875b1..aac1d620bf4cd1f18243f8c53cd32ab16fdeb616 100644
+index 02b9d280486a23d8eef650566dfaa10ac0b96c9c..cdc5ea3dd9559c076049c86a9fdb4e8bf85ff6c0 100644
 --- a/src/main/java/net/minecraft/world/entity/Entity.java
 +++ b/src/main/java/net/minecraft/world/entity/Entity.java
 @@ -2678,19 +2678,45 @@ public abstract class Entity implements SyncedDataHolder, Nameable, EntityAccess
@@ -80,7 +80,7 @@ index 1d66c35b1092b8101f0a803d8c087e5a958875b1..aac1d620bf4cd1f18243f8c53cd32ab1
                  return null;
              }
              // CraftBukkit end
-             ItemEntity entityitem = new ItemEntity(world, this.getX(), this.getY() + (double) yOffset, this.getZ(), stack);
+             ItemEntity entityitem = new ItemEntity(world, this.getX(), this.getY() + (double) yOffset, this.getZ(), stack.copy()); // Paper - copy so we can destroy original
              stack.setCount(0); // Paper - destroy this item - if this ever leaks due to game bugs, ensure it doesn't dupe
  
 -            entityitem.setDefaultPickUpDelay();