Fix the MS-Windows build broken by recent errno changes

* src/fileio.c (file_directory_p): If the file exists, but is
not a directory, set errno to ENOTDIR, like the Posix branch
does; openp expects that.

1 files changed, 4 insertions, 1 deletions

diff --git a/src/fileio.c b/src/fileio.c
index 58bc6b7ee8c..53eecc31aaf 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -2961,7 +2961,10 @@ file_directory_p (Lisp_Object file)
 {
 #ifdef DOS_NT
   /* This is cheaper than 'stat'.  */
-  return faccessat (AT_FDCWD, SSDATA (file), D_OK, AT_EACCESS) == 0;
+  bool retval = faccessat (AT_FDCWD, SSDATA (file), D_OK, AT_EACCESS) == 0;
+  if (!retval && errno == EACCES)
+    errno = ENOTDIR;    /* like the non-DOS_NT branch below does */
+  return retval;
 #else
 # ifdef O_PATH
   /* Use O_PATH if available, as it avoids races and EOVERFLOW issues.  */