if cards in multiple zones are selected, don't create drag items for the ones...

if cards in multiple zones are selected, don't create drag items for the ones you're not supposed to move

cockatrice/src/carditem.cpp

@@ -295,7 +295,7 @@ void CardItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 		int j = 0;
 		for (int i = 0; i < sel.size(); i++) {
 			CardItem *c = (CardItem *) sel.at(i);
-			if (c == this)
+			if ((c == this) || (c->getZone() != zone))
 				continue;
 			++j;
 			QPointF childPos;