fix: don't crash if content is undefined

src/socket.io/index.js

@@ -150,6 +150,7 @@ async function onMessage(socket, payload) {
 			});
 		}
 	} catch (err) {
+		winston.error(err.stack ? err.stack : err.message);
 		callback({ message: err.message });
 	}
 }

src/socket.io/posts.js

@@ -178,7 +178,10 @@ SocketPosts.editQueuedContent = async function (socket, data) {
 		throw new Error('[[error:invalid-data]]');
 	}
 	await posts.editQueuedContent(socket.uid, data.id, data.content, data.title);
-	return await plugins.fireHook('filter:parse.post', { postData: data });
+	if (data.content) {
+		return await plugins.fireHook('filter:parse.post', { postData: data });
+	}
+	return { postData: data };
 };
 
 require('../promisify')(SocketPosts);