mod_conference: Fix deadlock

src/mod/applications/mod_conference/mod_conference.c

@@ -2582,6 +2582,7 @@ static void conference_loop_output(conference_member_t *member)
 					}
 					if (switch_core_session_write_frame(member->session, &write_frame, SWITCH_IO_FLAG_NONE, 0) != SWITCH_STATUS_SUCCESS) {
 						switch_channel_hangup(channel, SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER);
+						switch_mutex_unlock(member->audio_out_mutex);
 						break;
 					}
 				}