grovel: fix Lispworks's %INVOKE
grovel: fix Lispworks's %INVOKE

cffi/cffi,stassats/cffi,dochang/cffi,akovalenko/cffi,3b/cffi,stassats/cffi,attila-lendvai/cffi,cffi/cffi,mcna/cffi,3b/cffi,wesen/cffi,mcna/cffi,dochang/cffi,dochang/cffi,3b/cffi,akovalenko/cffi,attila-lendvai/cffi,marsijanin/cffi,marsijanin/cffi,kingcheez/cffi-cheez,dkochmanski/cffi,dkochmanski/cffi,marsijanin/cffi,kingcheez/cffi-cheez,stassats/cffi,wesen/cffi,dkochmanski/cffi,kingcheez/cffi-cheez,wesen/cffi,cffi/cffi,akovalenko/cffi