dib: fail nicely on XShmAttach failure

[Huw D M Davies]

        Huw Davies <huw at codeweavers.com>
        If XShmAttach fails then reset shmid to -1 so that we don't
        try to use it later.
-- 
Huw Davies
huw at codeweavers.com
Index: dlls/x11drv/dib.c
===================================================================
RCS file: /home/wine/wine/dlls/x11drv/dib.c,v
retrieving revision 1.37
diff -u -p -r1.37 dib.c
--- dlls/x11drv/dib.c	20 Apr 2005 18:45:28 -0000	1.37
+++ dlls/x11drv/dib.c	22 Apr 2005 14:23:33 -0000
@@ -4583,6 +4583,7 @@ static XImage *X11DRV_XShmCreateImage( i
                 shmdt(shminfo->shmaddr);
             }
             shmctl(shminfo->shmid, IPC_RMID, 0);
+            shminfo->shmid = -1;
         }
         XFlush(gdi_display);
         XDestroyImage(image);