fixed 2 bugs with gc

toxygen/mainscreen.py

@@ -618,7 +618,7 @@ class MainWindow(QtWidgets.QMainWindow, Singleton):
                     for i in range(len(chats)):
                         name, number = chats[i]
                         item = invite_menu.addAction(name)
-                        item.triggered.connect(lambda: self.invite_friend_to_gc(num, number))
+                        item.triggered.connect(lambda number=number: self.invite_friend_to_gc(num, number))
 
                 plugins_loader = plugin_support.PluginLoader.get_instance()
                 if plugins_loader is not None:

toxygen/profile.py

@@ -1316,6 +1316,8 @@ class Profile(basecontact.BaseContact, Singleton):
         return list(groups)[0]
 
     def add_gc(self, number):
+        if number == -1:
+            return
         widget = self.create_friend_item()
         gc = GroupChat('Group chat #' + str(number), '', widget, self._tox, number)
         self._contacts.append(gc)