only enforce the video-bridge mode if the flag is set on the conference too

src/mod/applications/mod_conference/mod_conference.c

@@ -1383,7 +1383,7 @@ static void *SWITCH_THREAD_FUNC conference_thread_run(switch_thread_t *thread, v
 				if (switch_channel_ready(channel) && switch_channel_test_flag(channel, CF_VIDEO)) {
 					members_with_video++;
 					
-					if (switch_test_flag(imember, MFLAG_VIDEO_BRIDGE)) {
+					if (switch_test_flag(conference, CFLAG_VIDEO_BRIDGE) && switch_test_flag(imember, MFLAG_VIDEO_BRIDGE)) {
 						if (!video_bridge_members[0]) {
 							video_bridge_members[0] = imember;
 						} else {