examples/decoding_encoding: check av_samples_get_buffer_size() for a negative value

Fix broken != 0 check.

1 files changed, 1 insertions, 1 deletions

diff --git a/doc/examples/decoding_encoding.c b/doc/examples/decoding_encoding.c
index 4d2813b052..08e8b9212c 100644
--- a/doc/examples/decoding_encoding.c
+++ b/doc/examples/decoding_encoding.c
@@ -170,7 +170,7 @@ static void audio_encode_example(const char *filename)
      * we calculate the size of the samples buffer in bytes */
     buffer_size = av_samples_get_buffer_size(NULL, c->channels, c->frame_size,
                                              c->sample_fmt, 0);
-    if (!buffer_size) {
+    if (buffer_size < 0) {
         fprintf(stderr, "Could not get sample buffer size\n");
         exit(1);
     }