Fix a partial-application warning in the tests.
Fix a partial-application warning in the tests.

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