Index: /trunk/src/VBox/Additions/x11/vboxvideo/vboxvideo.c
===================================================================
--- /trunk/src/VBox/Additions/x11/vboxvideo/vboxvideo.c	(revision 35154)
+++ /trunk/src/VBox/Additions/x11/vboxvideo/vboxvideo.c	(revision 35155)
@@ -1293,5 +1293,5 @@
     VBOXPtr pVBox = VBOXGetRec(pScrn);
     Bool rc = TRUE, fActive = TRUE;
-    uint32_t offStart, cwReal;
+    uint32_t offStart, cwReal = cWidth;
 
     TRACE_LOG("cDisplay=%u, cWidth=%u, cHeight=%u, x=%d, y=%d, displayWidth=%d\n",