Ahaggar: silence GCC warnings

Signed-off-by: Djalal Harouni <tixxdz@opendz.org>
Ahaggar: make inline first keyword

Signed-off-by: Djalal Harouni <tixxdz@opendz.org>
Ahaggar: do not ignore write() results

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