Ahaggar: add a check for allocation size

Signed-off-by: Djalal Harouni <tixxdz@opendz.org>
Ahaggar: add a file that contains some constants checks

Signed-off-by: Djalal Harouni <tixxdz@opendz.org>
Ahaggar: add the checks.h header file for checks declarations

Signed-off-by: Djalal Harouni <tixxdz@opendz.org>