examples: Add check and replace av_free() to avoid potential memory errors

Add check for the return value of av_packet_alloc() to avoid potential NULL pointer dereference.
Moreover, replace redundant av_free() with fprintf().

Fixes: 9a38184a14 ("examples/decode_audio: allocate the packet dynamically")
Signed-off-by: Jiasheng Jiang <[email protected]>
Reviewed-by: Nicolas George <[email protected]>
Signed-off-by: Michael Niedermayer <[email protected]>

0 files changed, 0 insertions, 0 deletions