Fix compilation error in dce.ml.

[tritao]

Its my first time hacking on Haxe and I came across the following error. The fix works, but I am not really sure what I am doing with OCaml yet, so is this a proper fix to the error?

This fixes the following compilation error:

File "src/optimization/dce.ml", line 90, characters 13-48:
90 |    List.exists (ExtString.String.starts_with file) dce.std_dirs
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Error: This expression has type prefix:string -> bool
       but an expression was expected of type 'a -> bool
make: *** [Makefile:81: haxe] Error 1

By replacing:

let is_std_file dce file =
	List.exists (ExtString.String.starts_with file) dce.std_dirs

with:

let is_std_file dce file =
	List.exists (fun dir -> ExtString.String.starts_with file dir)
dce.std_dirs

[Simn]

What OCaml version are you using? This change is good regardless, I just wonder why this hasn't come up before.

[tritao]

What OCaml version are you using? This change is good regardless, I just wonder why this hasn't come up before.

$ ocaml --version
The OCaml toplevel, version 5.2.0
$ opam --version
2.1.6

[Simn]

Thanks!