Fixes

- Fixed NPE occuring when Jigsaw fails to find Object in pool. Now just produces a warning in the console like it should
- Fixed pointless copies of lists being created within PlannedStructure
- Fixed mobs spawning within other blocks and suffocating on spawn
- Fixed creating a jigsaw with a non existent object causing jigsaw commands to lock up (#377)
- Fixed editing a non existent jigsaw just not doing anything

src/main/java/com/volmit/iris/manager/command/jigsaw/CommandIrisJigsawEdit.java

@@ -53,8 +53,11 @@ public class CommandIrisJigsawEdit extends MortarCommand
 		{
 			File dest = piece.getLoadFile();
 			new JigsawEditor(sender.player(), piece, IrisDataManager.loadAnyObject(piece.getObject()), dest);
+			return true;
 		}
 
+		sender.sendMessage("Failed to find existing jigsaw piece: " + args[0]);
+
 		return true;
 	}
 

src/main/java/com/volmit/iris/manager/command/jigsaw/CommandIrisJigsawNew.java

@@ -48,6 +48,12 @@ public class CommandIrisJigsawNew extends MortarCommand
 		}
 
 		IrisObject object = IrisDataManager.loadAnyObject(args[2]);
+
+		if (object == null) {
+			sender.sendMessage("Failed to find existing object: " + args[2]);
+			return true;
+		}
+
 		File dest = Iris.instance.getDataFile("packs", args[1], "jigsaw-pieces", args[0] + ".json");
 		new JigsawEditor(sender.player(), null, object, dest);
 		sender.sendMessage("* Right Click blocks to make them connectors");