eloop: Fix crash on signal handler cancelling next timeout

It is possible that the timeout pointer becomes invalid in one of the
signal handlers, so we need to reload the pointer after those.

src/utils/eloop.c

@@ -529,6 +529,8 @@ void eloop_run(void)
 		eloop_process_pending_signals();
 
 		/* check if some registered timeouts have occurred */
+		timeout = dl_list_first(&eloop.timeout, struct eloop_timeout,
+					list);
 		if (timeout) {
 			os_get_time(&now);
 			if (!os_time_before(&now, &timeout->time)) {