Debugging isErrant()

src/engine/objects/Mine.java

@@ -100,6 +100,9 @@ public class Mine extends AbstractGameObject {
             this.zoneName = "Unknown Mine";
         }
 
+        if (ownerUID == 0)
+            ownerUID = ownerUID - 1 + 1;
+
         this.owningGuild = Guild.getGuild(ownerUID);
         Guild nation = null;