Compile.

QNSPanel must be a NSPanel and not a QNSWindow
subclass.

Change-Id: I1de31e147757824610f4aabc0ef66ae3906dc0f6
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>

src/plugins/platforms/cocoa/qcocoawindow.h

@@ -60,10 +60,10 @@ QT_BEGIN_NAMESPACE
 
 @end
 
-@interface QNSPanel : QNSWindow {
+@interface QNSPanel : NSPanel {
 
 }
-
+- (BOOL)canBecomeKeyWindow;
 @end
 
 class QCocoaWindow : public QPlatformWindow

src/plugins/platforms/cocoa/qcocoawindow.mm

@@ -69,6 +69,11 @@
 
 @implementation QNSPanel
 
+- (BOOL)canBecomeKeyWindow
+{
+    return YES;
+}
+
 @end
 
 QCocoaWindow::QCocoaWindow(QWindow *tlw)