fixed factory auto attack

src/ei/game/scene/map/Factory.java

@@ -55,6 +55,10 @@ public class Factory extends Building{
 	@Override
 	protected SelectBox getSelection() {
 		return selectionBox;
-	}	
+	}
+	
+	public boolean isTerrain(){
+		return true;
+	}
 	
 }

src/ei/game/scene/map/MapEntity.java

@@ -19,10 +19,13 @@ public abstract class MapEntity extends Unit{
 			remove();
 		}
 	}
+	
 	public void move(boolean play, int x, int y){
 	}
+	
 	public void attack(Vector2i target, boolean play) {
 	}
+	
 	public boolean isTerrain(){
 		return true;
 	}