Fix crash when crossfading at natural track transition - FS#10814

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23758 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 3 insertions, 0 deletions

diff --git a/apps/pcmbuf.c b/apps/pcmbuf.c
index 04e007f91d..ebb058cf87 100644
--- a/apps/pcmbuf.c
+++ b/apps/pcmbuf.c
@@ -722,6 +722,9 @@ static size_t find_chunk(size_t length, struct chunkdesc **chunk)
 static size_t crossfade_mix_fade(int factor, size_t length, const char *buf,
                                  size_t *out_sample, struct chunkdesc **out_chunk)
 {
+    if (length == 0)
+        return 0;
+
     const int16_t *input_buf = (const int16_t *)buf;
     int16_t *output_buf = (int16_t *)((*out_chunk)->addr);
     int16_t *chunk_end = SKIPBYTES(output_buf, (*out_chunk)->size);