windows: provide NonZeroDWORD

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

Author: ijackson

Diff for: library/std/src/sys/windows/c.rs

@@ -4,6 +4,7 @@
 #![cfg_attr(test, allow(dead_code))]
 #![unstable(issue = "none", feature = "windows_c")]
 
+use crate::os::raw::NonZero_c_ulong;
 use crate::os::raw::{c_char, c_int, c_long, c_longlong, c_uint, c_ulong, c_ushort};
 use crate::ptr;
 
@@ -13,6 +14,7 @@ pub use self::EXCEPTION_DISPOSITION::*;
 pub use self::FILE_INFO_BY_HANDLE_CLASS::*;
 
 pub type DWORD = c_ulong;
+pub type NonZeroDWORD = NonZero_c_ulong;
 pub type HANDLE = LPVOID;
 pub type HINSTANCE = HANDLE;
 pub type HMODULE = HINSTANCE;