MoveItemSomewhere double bugfix

-> Fix bug where MoveSomewhere from an infinite source would fill the destination inventory with copies of itself.
-> Fix bug where MoveSomewhere would needlessly call callbacks.
-> Remove trailing whitespaces

src/inventorymanager.cpp

@@ -380,6 +380,10 @@ void IMoveAction::apply(InventoryManager *mgr, ServerActiveObject *player, IGame
 
 	// If source is infinite, reset it's stack
 	if (src_can_take_count == -1) {
+		// For the caused_by_move_somewhere == true case we didn't force-put the item,
+		// which guarantees there is no leftover, and code below would duplicate the
+		// (not replaced) to_stack_was item.
+		if (!caused_by_move_somewhere) {
 			// If destination stack is of different type and there are leftover
 			// items, attempt to put the leftover items to a different place in the
 			// destination inventory.
@@ -392,9 +396,12 @@ void IMoveAction::apply(InventoryManager *mgr, ServerActiveObject *player, IGame
 					}
 				}
 			}
+		}
+		if (move_count > 0) {
 			list_from->deleteItem(from_i);
 			list_from->addItem(from_i, from_stack_was);
 		}
+	}
 	// If destination is infinite, reset it's stack and take count from source
 	if(dst_can_put_count == -1){
 		list_to->deleteItem(to_i);
@@ -416,6 +423,13 @@ void IMoveAction::apply(InventoryManager *mgr, ServerActiveObject *player, IGame
 			<< " i=" << to_i
 			<< std::endl;
 
+	// If we are inside the move somewhere loop, we don't need to report
+	// anything if nothing happened (perhaps we don't need to report
+	// anything for caused_by_move_somewhere == true, but this way its safer)
+	if (caused_by_move_somewhere && move_count == 0) {
+		return;
+	}
+
 	/*
 		Record rollback information
 	*/