[FFmpeg-cvslog] vp9: don't retain NULL as segmentation_map

ffmpeg | branch: release/2.7 | Andreas Cadhalpun | Wed Jun 17 19:02:15 2015 +0200| [250cf2d4dae0baf14ecdd6744c9555d24a6668ff] | committer: Michael Niedermayer vp9: don't retain NULL as segmentation_map This fixes segmentation faults, which were introduced in commit 4ba8f327. Reviewed-by: Rona

[FFmpeg-cvslog] vp9: don't retain NULL as segmentation_map

ffmpeg | branch: master | Andreas Cadhalpun | Wed Jun 17 19:02:15 2015 +0200| [d216b9debd9843d31732ebb7344a85b3cd96b7cc] | committer: Andreas Cadhalpun vp9: don't retain NULL as segmentation_map This fixes segmentation faults, which were introduced in commit 4ba8f327. Reviewed-by: Ronald S. B