only assume sendonly is hold operation when call is already answered in proxy-media situation

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@15698 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/endpoints/mod_sofia/sofia_glue.c

@@ -1170,7 +1170,8 @@ void sofia_glue_tech_patch_sdp(private_object_t *tech_pvt)
 
 	len = strlen(tech_pvt->local_sdp_str) * 2;
 	
-	if (switch_stristr("sendonly", tech_pvt->local_sdp_str) || switch_stristr("0.0.0.0", tech_pvt->local_sdp_str)) {
+	if (switch_channel_test_flag(tech_pvt->channel, CF_ANSWERED) && 
+		(switch_stristr("sendonly", tech_pvt->local_sdp_str) || switch_stristr("0.0.0.0", tech_pvt->local_sdp_str))) {
 	    switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(tech_pvt->session), SWITCH_LOG_DEBUG, "Skip patch on hold SDP\n");
 	    return;
 	}