This is also what av_base64_encode() expects.
Fixes the following warnings with clang:
libavformat/sdp.c:394:40: warning: implicit conversion from 'int' to 'char' changes value from 254 to -2
libavformat/sdp.c:395:40: warning: implicit conversion from 'int' to 'char' changes value from 205 to -51
libavformat/sdp.c:396:40: warning: implicit conversion from 'int' to 'char' changes value from 186 to -70
static char *xiph_extradata2config(AVFormatContext *s, AVCodecParameters *par)
{
- char *config, *encoded_config;
+ uint8_t *config;
+ char *encoded_config;
const uint8_t *header_start[3];
int headers_len, header_len[3], config_len;
int first_header_size;