ephyr: Send RRCrtcChangeNotify events on resize

After resizing Xephyr's window RRGetCrtcInfo returns the changed size,
but the RRCrtcChangeNotify event is not sent.
Call RRGetInfo(pScreen, TRUE) to update the current mode and send
notifications to clients.

hw/kdrive/ephyr/ephyr.c

@@ -567,6 +567,7 @@ ephyrRandRSetConfig(ScreenPtr pScreen,
     if (wasEnabled)
         KdEnableScreen(pScreen);
 
+    RRGetInfo(pScreen, TRUE);
     RRScreenSizeNotify(pScreen);
 
     return TRUE;