Create chat session when no resource

src/ui/core.c

@@ -1333,6 +1333,7 @@ ui_new_chat_win(const char * const barejid)
     // create new window
     if (window == NULL) {
         window = wins_new_chat(barejid);
+        chat_session_on_window_open(barejid);
 
         num = wins_get_num(window);