factor channel count into flush len

src/mod/applications/mod_conference/mod_conference.c

@@ -4277,7 +4277,7 @@ static void *SWITCH_THREAD_FUNC conference_loop_input(switch_thread_t *thread, v
 
 	switch_channel_audio_sync(channel);
 
-	flush_len = switch_samples_per_packet(member->conference->rate, member->conference->interval) * 6;
+	flush_len = switch_samples_per_packet(member->conference->rate, member->conference->interval) * member->conference->channels * 10;
 
 	/* As long as we have a valid read, feed that data into an input buffer where the conference thread will take it 
 	   and mux it with any audio from other channels. */