Remove url_feof check that would be triggered only after incorrectly producing

an empty packet and also av_get_packet already handles EOF now.

Originally committed as revision 20140 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/wav.c

@@ -247,8 +247,6 @@ static int wav_read_packet(AVFormatContext *s,
     AVStream *st;
     WAVContext *wav = s->priv_data;
 
-    if (url_feof(s->pb))
-        return AVERROR(EIO);
     st = s->streams[0];
 
     left = wav->data_end - url_ftell(s->pb);