Only use first stream in the storyboard code.

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@4736 92316355-f0b4-4df1-b90c-862c8a59935f

examples/storyboard.c

@@ -73,7 +73,10 @@ int main(int argc, char *argv[])
     stream = -1;
     for(i = 0; stream == -1 && i < (int)fmt->nb_streams; i++)
         if(fmt->streams[i]->codec->codec_type == CODEC_TYPE_VIDEO)
+        {
             stream = i;
+            break;
+        }
     if(stream == -1)
         return EXIT_FAILURE;
     ctx = fmt->streams[stream]->codec;