fixup??? core.fsyncobjectfiles: add windows support for batch mode

Let's avoid including `winternl.h`, it only brings pain and suffering
with it.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

compat/win32/flush.c

@@ -1,7 +1,14 @@
 #include "../../git-compat-util.h"
-#include <winternl.h>
 #include "lazyload.h"
 
+typedef struct _IO_STATUS_BLOCK {
+	union {
+		NTSTATUS Status;
+		PVOID    Pointer;
+	} u;
+	ULONG_PTR Information;
+} IO_STATUS_BLOCK, *PIO_STATUS_BLOCK;
+
 int win32_fsync_no_flush(int fd)
 {
        IO_STATUS_BLOCK io_status;