Add a forward declaration for QTransform

Change-Id: I6a67a48cb700bfca7c6f6b55fe5ef30b4fdcf400
Reviewed-on: http://codereview.qt-project.org/4398
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Vesa Rantanen <vesa.rantanen@nokia.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>

src/gui/kernel/qinputpanel.h

@@ -53,6 +53,7 @@ QT_MODULE(Gui)
 class QInputPanelPrivate;
 class QWindow;
 class QRectF;
+class QTransform;
 
 class Q_GUI_EXPORT QInputPanel : public QObject
 {