grovel: refactor convert-intmax-constant
grovel: refactor convert-intmax-constant

attila-lendvai/cffi,dkochmanski/cffi,dkochmanski/cffi,mcna/cffi,3b/cffi,mcna/cffi,stassats/cffi,stassats/cffi,stassats/cffi,cffi/cffi,cffi/cffi,cffi/cffi,3b/cffi,3b/cffi,dkochmanski/cffi,attila-lendvai/cffi