Fix Q_INTERFACES warnings

Fix #88

cockatrice/src/abstractcarddragitem.h

@@ -9,6 +9,7 @@ class CardInfo;
 
 class AbstractCardDragItem : public QObject, public QGraphicsItem {
     Q_OBJECT
+    Q_INTERFACES(QGraphicsItem)
 protected:
     AbstractCardItem *item;
     QPointF hotSpot;

cockatrice/src/abstractcounter.h

@@ -9,6 +9,7 @@ class QAction;
 
 class AbstractCounter : public QObject, public QGraphicsItem {
     Q_OBJECT
+    Q_INTERFACES(QGraphicsItem)
 protected:
     Player *player;
     int id;

cockatrice/src/arrowitem.h

@@ -11,6 +11,7 @@ class ArrowTarget;
 
 class ArrowItem : public QObject, public QGraphicsItem {
     Q_OBJECT
+    Q_INTERFACES(QGraphicsItem)
 private:
     QPainterPath path;
     QMenu *menu;

cockatrice/src/phasestoolbar.h

@@ -11,6 +11,7 @@ class GameCommand;
 
 class PhaseButton : public QObject, public QGraphicsItem {
     Q_OBJECT
+    Q_INTERFACES(QGraphicsItem)
 private:
     QString name;
     bool active, highlightable;
@@ -39,6 +40,7 @@ protected:
 
 class PhasesToolbar : public QObject, public QGraphicsItem {
     Q_OBJECT
+    Q_INTERFACES(QGraphicsItem)
 private:
     QList<PhaseButton *> buttonList;
     PhaseButton *nextTurnButton;

cockatrice/src/player.h

@@ -58,7 +58,8 @@ class PendingCommand;
 
 class PlayerArea : public QObject, public QGraphicsItem {
     Q_OBJECT
-private:    
+    Q_INTERFACES(QGraphicsItem)
+private:
     QBrush bgPixmapBrush;
     QRectF bRect;
 private slots:
@@ -76,6 +77,7 @@ public:
 
 class Player : public QObject, public QGraphicsItem {
     Q_OBJECT
+    Q_INTERFACES(QGraphicsItem)
 signals:
     void openDeckEditor(const DeckLoader *deck);
     void newCardAdded(AbstractCardItem *card);

cockatrice/src/zoneviewzone.h

@@ -11,6 +11,7 @@ class QGraphicsSceneWheelEvent;
 
 class ZoneViewZone : public SelectZone, public QGraphicsLayoutItem {
     Q_OBJECT
+    Q_INTERFACES(QGraphicsLayoutItem)
 private:
     QRectF bRect, optimumRect;
     int minRows, numberCards;