Various fixes

StevenDimDoors/mod_pocketDim/core/DimLink.java

@@ -4,7 +4,6 @@ import java.util.LinkedList;
 import java.util.List;
 
 import StevenDimDoors.mod_pocketDim.util.Point4D;
-@Deprecated
 public abstract class DimLink
 {	
 	protected Point4D source;

StevenDimDoors/mod_pocketDim/core/NewDimData.java

@@ -337,7 +337,11 @@ public abstract class NewDimData
 		{
 			linkList.remove(target);
 			//Raise deletion event
-			linkWatcher.onDeleted(target.source);
+			//TODO why is source null here?
+			if(target.source!=null)
+			{
+				linkWatcher.onDeleted(target.source);
+			}
 			target.clear();
 		}
 		return (target != null);