Fixed crash in printsupport on Windows

Change-Id: I3fec51b9f5c55296041b79bbf6da9d7687ae9afd
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

src/gui/painting/qpagedpaintdevice.cpp

@@ -39,18 +39,11 @@
 **
 ****************************************************************************/
 
+#include "qpagedpaintdevice_p.h"
 #include <qpagedpaintdevice.h>
 
 QT_BEGIN_NAMESPACE
 
-class QPagedPaintDevicePrivate
-{
-public:
-    QPagedPaintDevice::PageSize pageSize;
-    QSizeF pageSizeMM;
-    QPagedPaintDevice::Margins margins;
-};
-
 static const struct {
     float width;
     float height;