Fixed a bug that was accidentally introduced by the addition of MPEG Transport

Stream support.  We now handle errors such as 'stream not found' correctly once
again.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@12044 b3059339-0415-0410-9bf9-f77b7e298cf2

libmpdemux/demux_rtp.cpp

@@ -120,6 +120,7 @@ static char* openURL_sip(SIPClient* client, char const* url) {
 int rtspStreamOverTCP = 0; 
 
 extern "C" demuxer_t* demux_open_rtp(demuxer_t* demuxer) {
+  Boolean success = False;
   do {
     TaskScheduler* scheduler = BasicTaskScheduler::createNew();
     if (scheduler == NULL) break;
@@ -253,7 +254,9 @@ extern "C" demuxer_t* demux_open_rtp(demuxer_t* demuxer) {
       }
       rtpState->flags |= flags;
     }
+    success = True;
   } while (0);
+  if (!success) return NULL; // an error occurred
 
   // Hack: If audio and video are demuxed together on a single RTP stream,
   // then create a new "demuxer_t" structure to allow the higher-level