crash fix; weird behaviour fix

cockatrice/src/carddragitem.cpp

@@ -52,12 +52,13 @@ void CardDragItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 	QPointF sp = pos();
 	sc->removeItem(this);
 
-	if (currentZone) {
-		CardZone *startZone = static_cast<CardItem *>(item)->getZone();
+	CardZone *startZone = static_cast<CardItem *>(item)->getZone();
+	if (currentZone && !(static_cast<CardItem *>(item)->getAttachedTo() && (startZone == currentZone))) {
 		currentZone->handleDropEvent(id, startZone, (sp - currentZone->scenePos()).toPoint(), faceDown);
 		for (int i = 0; i < childDrags.size(); i++) {
 			CardDragItem *c = static_cast<CardDragItem *>(childDrags[i]);
-			currentZone->handleDropEvent(c->id, startZone, (sp - currentZone->scenePos() + c->getHotSpot()).toPoint(), faceDown);
+			if (!(static_cast<CardItem *>(c->item)->getAttachedTo() && (startZone == currentZone)))
+				currentZone->handleDropEvent(c->id, startZone, (sp - currentZone->scenePos() + c->getHotSpot()).toPoint(), faceDown);
 			sc->removeItem(c);
 		}
 	}

cockatrice/src/player.cpp

@@ -628,6 +628,9 @@ void Player::eventMoveCard(Event_MoveCard *event)
 	if (!card)
 		return;
 	
+	if (card->getAttachedTo() && (startZone != targetZone))
+		card->setAttachedTo(0);
+	
 	card->deleteDragItem();
 
 	card->setId(event->getNewCardId());

common/server_protocolhandler.cpp

@@ -518,6 +518,9 @@ ResponseCode Server_ProtocolHandler::moveCard(Server_Game *game, Server_Player *
 		return RespNameNotFound;
 	
 	if (startzone != targetzone) {
+		if (card->getParentCard())
+			card->setParentCard(0);
+		
 		const QList<Server_Card *> &attachedCards = card->getAttachedCards();
 		for (int i = 0; i < attachedCards.size(); ++i)
 			unattachCard(game, attachedCards[i]->getZone()->getPlayer(), cont, attachedCards[i]);