Misc fix (#951):  Fixed pjsua bug RTP timestamp & sequence resetted after hold-resume (thanks Nikolay Popok for the report).

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@2996 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjsip/src/pjsua-lib/pjsua_media.c b/pjsip/src/pjsua-lib/pjsua_media.c
index 06d1277..ebabd8e 100644
--- a/pjsip/src/pjsua-lib/pjsua_media.c
+++ b/pjsip/src/pjsua-lib/pjsua_media.c
@@ -1392,8 +1392,9 @@
     if (call->session) {
 	pjmedia_rtcp_stat stat;
 
-	if (pjmedia_session_get_stream_stat(call->session, 0, &stat) 
-	    == PJ_SUCCESS)
+	if ((call->media_dir & PJMEDIA_DIR_ENCODING) &&
+	    (pjmedia_session_get_stream_stat(call->session, 0, &stat) 
+	     == PJ_SUCCESS))
 	{
 	    /* Save RTP timestamp & sequence, so when media session is 
 	     * restarted, those values will be restored as the initial