Fix valgrind and asan memory leaks and crashes.

libavformat/oggparsevorbis.c

 /**
       Copyright (C) 2005  Michael Ahlberg, Måns Rullgård
 
       Permission is hereby granted, free of charge, to any person
       obtaining a copy of this software and associated documentation
       files (the "Software"), to deal in the Software without
       restriction, including without limitation the rights to use, copy,
       modify, merge, publish, distribute, sublicense, and/or sell copies
       of the Software, and to permit persons to whom the Software is
       furnished to do so, subject to the following conditions:
@@ skipping 141 matching lines @@
  * [audio_channels] = read 8 bit integer as unsigned | Used
  * [audio_sample_rate] = read 32 bits as unsigned integer | Used
  * [bitrate_maximum] = read 32 bits as signed integer | Not used yet
  * [bitrate_nominal] = read 32 bits as signed integer | Not used yet
  * [bitrate_minimum] = read 32 bits as signed integer | Used as bitrate
  * [blocksize_0] = read 4 bits as unsigned integer | Not Used
  * [blocksize_1] = read 4 bits as unsigned integer | Not Used
  * [framing_flag] = read one bit | Not Used
  *    */
 
-struct oggvorbis_private {
-    unsigned int len[3];
-    unsigned char *packet[3];
-};
-
-
 static unsigned int
 fixup_vorbis_headers(AVFormatContext * as, struct oggvorbis_private *priv,
                      uint8_t **buf)
 {
     int i,offset, len;
     unsigned char *ptr;
 
     len = priv->len[0] + priv->len[1] + priv->len[2];
     ptr = *buf = av_mallocz(len + len/255 + 64);
 
@@ skipping 95 matching lines @@
     }
 
     return 1;
 }
 
 const struct ogg_codec ff_vorbis_codec = {
     .magic = "\001vorbis",
     .magicsize = 7,
     .header = vorbis_header
 };