fix checks for twist .msg fields corectness in search results handling

js/twister_actions.js

@@ -439,13 +439,17 @@ function processQuery(req) {
         if (!_queryProcessedMap[req.id][key]) {
             _queryProcessedMap[req.id][key] = true;
 
+            if ((typeof userpost.msg !== 'string' || userpost.msg === '')
+                && (typeof userpost.rt !== 'object'
+                    || typeof userpost.rt.msg !== 'string' || userpost.rt.msg === ''))
+                continue;
+
             if ($.Options.filterLang.val !== 'disable' && $.Options.filterLangForSearching.val) {
-                if (typeof userpost.rt !== 'undefined') {
-                    var msg = userpost.rt.msg;
-                } else {
-                    var msg = userpost.msg;
-                }
-                langFilterData = filterLang(msg);
+                if (userpost.msg !== '')
+                    langFilterData = filterLang(userpost.msg);
+                else
+                    langFilterData = filterLang(userpost.rt.msg);
+
                 if ($.Options.filterLangSimulate.val) {
                     req.posts[i].langFilter = langFilterData;
                 } else {