Fail with 'failwith' in generated stubs, not 'assert'.
Fail with 'failwith' in generated stubs, not 'assert'.

dsheets/ocaml-ctypes,ocamllabs/ocaml-ctypes,whitequark/ocaml-ctypes,dsheets/ocaml-ctypes,dsheets/ocaml-ctypes,whitequark/ocaml-ctypes,sjfloat/ocaml-ctypes,sjfloat/ocaml-ctypes,ocamllabs/ocaml-ctypes,sjfloat/ocaml-ctypes,whitequark/ocaml-ctypes,yallop/ocaml-ctypes,yallop/ocaml-ctypes