fixes logic that allowed posts beyond maximum post length if min is set to 0, @barisusakli

src/socket.io/posts.js

@@ -22,7 +22,7 @@ require('./posts/bookmarks')(SocketPosts);
 require('./posts/tools')(SocketPosts);
 
 SocketPosts.reply = function (socket, data, callback) {
-	if (!data || !data.tid || !data.content) {
+	if (!data || !data.tid || (parseInt(meta.config.minimumPostLength, 10) !== 0 && !data.content)) {
 		return callback(new Error('[[error:invalid-data]]'));
 	}
 

src/topics/create.js

@@ -105,10 +105,6 @@ module.exports = function (Topics) {
 					data.content = utils.rtrim(data.content);
 				}
 
-				if (parseInt(meta.config.minimumPostLength, 10) === 0) {
-					// Abort if minimum post length is set to 0
-					return setImmediate(next);
-				}
 				check(data.content, meta.config.minimumPostLength, meta.config.maximumPostLength, 'content-too-short', 'content-too-long', next);
 			},
 			function (next) {
@@ -350,7 +346,7 @@ module.exports = function (Topics) {
 			item = S(item).stripTags().s.trim();
 		}
 
-		if (!item || item.length < parseInt(min, 10)) {
+		if (item === null || item === undefined || item.length < parseInt(min, 10)) {
 			return callback(new Error('[[error:' + minError + ', ' + min + ']]'));
 		} else if (item.length > parseInt(max, 10)) {
 			return callback(new Error('[[error:' + maxError + ', ' + max + ']]'));