FS-8602 #resolve [conference does not auto-generate layouts properly when…

FS-8602 #resolve [conference does not auto-generate layouts properly when callers with no camera are present]

src/mod/applications/mod_conference/conference_video.c

@@ -2088,8 +2088,9 @@ void *SWITCH_THREAD_FUNC conference_video_muxing_thread_run(switch_thread_t *thr
 
 			switch_mutex_lock(conference->member_mutex);
 			for (imember = conference->members; imember; imember = imember->next) {
-				if (imember->channel && switch_channel_ready(imember->channel) && conference_utils_member_test_flag(imember, MFLAG_RUNNING) 
-					&& imember->canvas_id == canvas->canvas_id) {
+				if (imember->channel && switch_channel_ready(imember->channel) && switch_channel_test_flag(imember->channel, CF_VIDEO) && 
+					conference_utils_member_test_flag(imember, MFLAG_RUNNING) 
+					&& imember->canvas_id == canvas->canvas_id && imember->video_media_flow != SWITCH_MEDIA_FLOW_SENDONLY) {
 					canvas_count++;
 				}
 			}