- pasted entities are assigned to the main sub (-> entities copypasted from another sub are saved)

- fixed submarinebody attempting to generate a physics body for a sub with no walls if there are some other walls loaded
- MathUtils.GiftWrap doesn't throw an exception if passed an empty list of points

Subsurface/Source/Map/MapEntity.cs

@@ -464,7 +464,11 @@ namespace Barotrauma
                     Vector2 moveAmount = Submarine.VectorToWorldGrid(cam.WorldViewCenter - center);
 
                     selectedList = new List<MapEntity>(clones);
-                    selectedList.ForEach(c => c.Move(moveAmount));                    
+                    foreach (MapEntity clone in selectedList)
+                    {
+                        clone.Move(moveAmount);
+                        clone.Submarine = Submarine.MainSub;
+                    }                    
                 }
             }