Add a sync member to QScreen class
Manuel Teira <manuel.teira@telefonica.net>

#
# Patch managed by http://www.holgerschurig.de/patcher.html
#

--- qt-2.3.10/src/kernel/qgfx_qws.h~fix-qscreen-sync
+++ qt-2.3.10/src/kernel/qgfx_qws.h
@@ -191,6 +191,7 @@
     virtual int pixmapOffsetAlignment() { return 64; }
     virtual int pixmapLinestepAlignment() { return 64; }
 
+    virtual void sync() {}
     virtual bool onCard(unsigned char *) const;
     virtual bool onCard(unsigned char *, ulong& out_offset) const;