Clear message field after send

A bug due to jQuery upgrade

Author: dittos

logviewer/templates/log.html

@@ -157,7 +157,7 @@ <h3>건너뛰기</h3>
 	var msg = $('#msg').val();
 	if (!msg) return;
 	socket.emit('msg', {nick: nickname, channel: channel, msg: msg});
-	$('#msg').attr('value', '');
+	$('#msg').val('');
 })
 </script>
 {% else %}