Handle value printing where the result contains null characters
Handle value printing where the result contains null characters

e.g.

   snprintf(buf, len, "'%c'", '\0')

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