avcodec/libvpxenc: Only search for side data when intending to use it

Also rewrite the code so that a variable that is only used
depending upon CONFIG_LIBVPX_VP9_ENCODER is not declared
outside of the #if block.
(The variable was declared with av_uninit, but it should have been
av_unused, as the former does not work for all compilers.)

Reviewed-by: James Zern <jzern@google.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

0 files changed, 0 insertions, 0 deletions