Make it easier to refer to local variables during C generation.
Make it easier to refer to local variables during C generation.

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