Placement::checkArea operates on AbstractClient

placement.cpp

@@ -610,7 +610,7 @@ void Placement::unclutterDesktop()
     }
 }
 
-QRect Placement::checkArea(const Client* c, const QRect& area)
+QRect Placement::checkArea(const AbstractClient* c, const QRect& area)
 {
     if (area.isNull())
         return workspace()->clientArea(PlacementArea, c->geometry().center(), c->desktop());

placement.h

@@ -34,6 +34,7 @@ class QObject;
 namespace KWin
 {
 
+class AbstractClient;
 class Client;
 
 class Placement
@@ -91,7 +92,7 @@ private:
     void place(Client* c, QRect& area, Policy policy, Policy nextPlacement = Unknown);
     void placeUnderMouse(Client* c, QRect& area, Policy next = Unknown);
     void placeOnMainWindow(Client* c, QRect& area, Policy next = Unknown);
-    QRect checkArea(const Client*c, const QRect& area);
+    QRect checkArea(const AbstractClient*c, const QRect& area);
 
     //CT needed for cascading+
     struct DesktopCascadingInfo {