pjmedia_conf_disconnect_port affect active connections

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Hi, i have a problem, i do whose steps:
1. i use conference bridge, i have 3 media ports
2. port 1 starts to transmit to port 2 with level 0 (through pjsua_conf_connect2)
3. port 1 starts to transmit to port 3 with normal level (through pjsua_conf_connect2)
4. port 1 stops to transmit to port 2 (through pjsua_conf_discconnect)
Port 3 still shold receive sound from port 1, but there is no sound. I suppose It's  an error in pjmedia_conf_disconnect_port: this routine doesn't remove value in listener_adj_level.
I've attached a path, it works for me 
diff --git a/pjmedia/src/pjmedia/conference.c b/pjmedia/src/pjmedia/conference.c
index a8cdef5..5e5fddf 100644
--- a/pjmedia/src/pjmedia/conference.c
+++ b/pjmedia/src/pjmedia/conference.c
@@ -1062,6 +1062,8 @@ PJ_DEF(pj_status_t) pjmedia_conf_disconnect_port( pjmedia_conf *conf,
 		  dst_port->transmitter_cnt < conf->max_ports);
 	pj_array_erase(src_port->listener_slots, sizeof(SLOT_TYPE), 
 		       src_port->listener_cnt, i);
+        pj_array_erase(src_port->listener_adj_level, sizeof(unsigned),
+                       src_port->listener_cnt, i);
 	--conf->connect_cnt;
 	--src_port->listener_cnt;
 	--dst_port->transmitter_cnt;
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