Personal links set a destination for annoying cruft reasons. Easier to

ignore it when someone is generating a personal dim than fix that.

src/main/java/StevenDimDoors/mod_pocketDim/world/PocketBuilder.java

@@ -286,7 +286,7 @@ public class PocketBuilder
 		{
 			throw new IllegalArgumentException("properties cannot be null.");
 		}
-		if (link.hasDestination())
+		if (link.linkType() != LinkType.PERSONAL && link.hasDestination())
 		{
 			throw new IllegalArgumentException("link cannot have a destination assigned already.");
 		}