MS C tests compile fixes

[Patrik Stridvall <ps@leissner.se>]

*** tests

* dlls/shell32/tests/shlfileop.c,
  dlls/user/tests/sysparams.c,
  dlls/user/tests/win.c,
  dlls/wininet/tests/http.c:
Fixed tests to compile with MS C on Windows.

Attachment: tests.diff
Description: Binary data