Fixes out of array accesses for non default buffers with large strides
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 4a30f085)
(cherry picked from commit 9c9fc79d9237d28e33161cb2e75082d8ad232b2e)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>