EncodeAlphaInternal: clear result->bw on error
This avoids a double free should the function fail prior to
VP8BitWriterInit() and a previous trial result's buffer carried over.
Previously in ApplyFiltersAndEncode() trial.bw (with a previous
iteration's buffer) would be freed, followed by best.bw pointing to the
same buffer.
Since:
187d379d add a fallback to ALPHA_NO_COMPRESSION
In addition, check the return value of VP8BitWriterInit() in this
function.
Bug: webp:603
Change-Id: Ic258381ee26c8c16bc211d157c8153831c8c6910
(cherry picked from commit a486d800b60d0af4cc0836bf7ed8f21e12974129)
1 file changed
