FS-7500: ping video thread on shutdown so it can end

src/switch_core_media.c

@@ -5311,6 +5311,10 @@ SWITCH_DECLARE(void) switch_core_session_wake_video_thread(switch_core_session_t
 		return;
 	}
 
+	if (!v_engine->media_thread) {
+		return;
+	}
+
 	if (!v_engine->mh.cond_mutex) {
 		switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_WARNING, "Channel %s has no cond?\n",
 						  switch_channel_get_name(session->channel));

src/switch_core_state_machine.c

@@ -501,6 +501,9 @@ SWITCH_DECLARE(void) switch_core_session_run(switch_core_session_t *session)
 			case CS_HANGUP:	/* Deactivate and end the thread */
 				{
 					switch_core_session_hangup_state(session, SWITCH_TRUE);
+					if (switch_channel_test_flag(session->channel, CF_VIDEO)) {
+						switch_core_session_wake_video_thread(session);
+					}
 					switch_channel_set_state(session->channel, CS_REPORTING);
 				}