vp5: Fix illegal read.

Found with Address Sanitizer
(cherry picked from commit bb4b0ad83b13c3af57675e80163f3f333adef96f)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit f62fa1ce9f12e4a43b41401a7416c6fa8da579c9)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
1 file changed