update cam on update call

coreapi/linphonecore.c

@@ -2230,6 +2230,8 @@ int linphone_core_update_call(LinphoneCore *lc, LinphoneCall *call, const Linpho
 #ifdef VIDEO_ENABLED
 		if (call->videostream!=NULL){
 			video_stream_set_sent_video_size(call->videostream,linphone_core_get_preferred_video_size(lc));
+			if (call->camera_active)
+				call->videostream->cam=lc->video_conf.device; /*to take into account eventual cam changes*/
 			video_stream_update_video_params (call->videostream);
 		}
 #endif