windows errors: Change type name for ERROR_SHARING_VIOLATION

DWORD is a type alias for u32, so this makes no difference.
But this entry is anomalous and in my forthcoming commits I am going
to import many errors wholesale, and I spotted that my wholesale
import didn't match what was here.

CC: Chris Denton <christophersdenton@gmail.com>
Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

Author: ijackson

std/src/sys/windows/c.rs

@@ -173,7 +173,7 @@ pub const ERROR_INVALID_HANDLE: DWORD = 6;
 pub const ERROR_NOT_ENOUGH_MEMORY: DWORD = 8;
 pub const ERROR_OUTOFMEMORY: DWORD = 14;
 pub const ERROR_NO_MORE_FILES: DWORD = 18;
-pub const ERROR_SHARING_VIOLATION: u32 = 32;
+pub const ERROR_SHARING_VIOLATION: DWORD = 32;
 pub const ERROR_HANDLE_EOF: DWORD = 38;
 pub const ERROR_FILE_EXISTS: DWORD = 80;
 pub const ERROR_INVALID_PARAMETER: DWORD = 87;