reenable test, data is available in this case

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@13412 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavformat/ffm.c

@@ -296,11 +296,8 @@ static int ffm_is_avail_data(AVFormatContext *s, int size)
     int len;
 
     len = ffm->packet_end - ffm->packet_ptr;
-    if (!ffm_nopts) {
-        /* XXX: I don't understand this test, so I disabled it for testing */
     if (size <= len)
         return 1;
-    }
     pos = url_ftell(s->pb);
     if (pos == ffm->write_index) {
         /* exactly at the end of stream */