hash_init: check for size being power of two
hash_init: check for size being power of two

It's really a bug if size is not power of
two. We must to be sure all callers are
sane.

Signed-off-by: Cyrill Gorcunov <7a1ea01eee6961eb1e372e3508c2670446d086f4@gmail.com>

letolabs/nasm,Distrotech/nasm,techkey/nasm,Distrotech/nasm,techkey/nasm,projedi/nasm,turingstudio/nasm,projedi/nasm,projedi/nasm,letolabs/nasm,techkey/nasm,Distrotech/nasm,turingstudio/nasm,projedi/nasm,turingstudio/nasm,turingstudio/nasm,projedi/nasm,techkey/nasm,techkey/nasm,letolabs/nasm,Distrotech/nasm