Even don't try to spawn invalid entityitem, fix for extrabiomes

patches/net/minecraft/entity/Entity.java.patch

@@ -780,3 +780,14 @@
      public float func_145772_a(Explosion p_145772_1_, World p_145772_2_, int p_145772_3_, int p_145772_4_, int p_145772_5_, Block p_145772_6_)
      {
          return p_145772_6_.getExplosionResistance(this, p_145772_2_, p_145772_3_, p_145772_4_, p_145772_5_, posX, posY + getEyeHeight(), posZ);
+@@ -2474,4 +2925,10 @@
+                 }
+             }
+         }
++    
++    // Cauldron start
++    public boolean entityAllowedToSpawn() {
++    	return true;
++    }
++    // Cauldron end
+ }

patches/net/minecraft/entity/item/EntityItem.java.patch

@@ -299,3 +299,14 @@
      }
  
      public void setEntityItemStack(ItemStack p_92058_1_)
+@@ -451,4 +526,10 @@
+     {
+         this.field_145801_f = p_145799_1_;
+     }
++    
++    @Override
++    public boolean entityAllowedToSpawn() {
++    	ItemStack stack = getDataWatcher().getWatchableObjectItemStack(10);
++    	return stack != null && stack.stackSize > 0;
++    }
+ }