Use Winapi on both cygwin and mingw32 to share more code between both.

grub-core/kern/emu/hostdisk_apple.c

@@ -45,7 +45,7 @@
 # include <sys/disk.h>
 
 grub_uint64_t
-grub_util_get_fd_size (int fd, const char *name, unsigned *log_secsize)
+grub_util_get_fd_size (grub_util_fd_t fd, const char *name, unsigned *log_secsize)
 {
   unsigned long long nr;
   unsigned sector_size, log_sector_size;
@@ -69,6 +69,6 @@ grub_util_get_fd_size (int fd, const char *name, unsigned *log_secsize)
 }
 
 void
-grub_hostdisk_configure_device_driver (int fd __attribute__ ((unused)))
+grub_hostdisk_configure_device_driver (grub_util_fd_t fd __attribute__ ((unused)))
 {
 }