Re #1263:
Fixed assertion when receiving a call with no video



git-svn-id: https://svn.pjsip.org/repos/pjproject/branches/projects/2.0-dev@3655 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjsip/src/pjsua-lib/pjsua_vid.c b/pjsip/src/pjsua-lib/pjsua_vid.c
index 95d02de..60d675f 100644
--- a/pjsip/src/pjsua-lib/pjsua_vid.c
+++ b/pjsip/src/pjsua-lib/pjsua_vid.c
@@ -746,7 +746,7 @@
 	PJ_LOG(4,(THIS_FILE,"Media updates%s", info));
     }
 
-    if (!acc->cfg.vid_out_auto_transmit) {
+    if (!acc->cfg.vid_out_auto_transmit && call_med->strm.v.stream) {
 	status = pjmedia_vid_stream_pause(call_med->strm.v.stream,
 					  PJMEDIA_DIR_ENCODING);
 	if (status != PJ_SUCCESS)