Use osdep_event_init() so that LIBEVENT_NOEPOLL and so on are set to turn off

broken event methods. Reported by Suraj N Kurapati.

tmux.c

@@ -337,5 +337,5 @@ main(int argc, char **argv)
 	free(label);
 
 	/* Pass control to the client. */
-	exit(client_main(event_init(), argc, argv, flags, shellcmd));
+	exit(client_main(osdep_event_init(), argc, argv, flags, shellcmd));
 }