added groupchat actions

src/main.c

@@ -116,6 +116,7 @@ static Tox *init_tox(int ipv4)
     tox_callback_friend_action(m, on_action, NULL);
     tox_callback_group_invite(m, on_groupinvite, NULL);
     tox_callback_group_message(m, on_groupmessage, NULL);
+    tox_callback_group_action(m, on_groupaction, NULL);
     tox_callback_group_namelist_change(m, on_group_namelistchange, NULL);
     tox_callback_file_send_request(m, on_file_sendrequest, NULL);
     tox_callback_file_control(m, on_file_control, NULL);