fix rox crash
@@ -1321,7 +1321,7 @@ enternotify(XEvent *e)
if ((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
return;
c = wintoclient(ev->window);
- if (selmon->sel && selmon->sel->isfloating && c != selmon->sel &&
+ if (c && selmon->sel && selmon->sel->isfloating && c != selmon->sel &&
(ev->window == root || (c->tags & selmon->sel->tags && c->mon == selmon) || selmon->sel->issticky)) {
if (!resizeborder(NULL))
return;
