the display's width and height are updated after an XRandR event so we

don't need to pass down the new values to screen_update_geometry(); so
just read the width/height values directly for both uses of
screen_update_geometry().  prep for further changes in this area.

xevents.c

@@ -365,7 +365,7 @@ xev_handle_randr(XEvent *ee)
 	TAILQ_FOREACH(sc, &Screenq, entry) {
 		if (sc->which == (u_int)i) {
 			XRRUpdateConfiguration(ee);
-			screen_update_geometry(sc, rev->width, rev->height);
+			screen_update_geometry(sc);
 			screen_init_xinerama(sc);
 		}
 	}