win32: make realpath() return an error if necessary

resolve_symlinks() uses GetFinalPathNameByHandleA which is loaded
at runtime because it isn't available in all versions of Windows.

If GetFinalPathNameByHandleA isn't available resolve_symlinks()
(and hence realpath()) should return a NULL pointer to indicate an
error, not the original path.  Not returning NULL causes an infinite
loop in do_lstat().

See GitHub issue #204.

1 files changed, 0 insertions, 1 deletions

diff --git a/win32/mingw.c b/win32/mingw.c
index 75f15aa30..ed0989be2 100644
--- a/win32/mingw.c
+++ b/win32/mingw.c
@@ -1088,7 +1088,6 @@ static char *resolve_symlinks(char *path)
                                 FILE_FLAG_BACKUP_SEMANTICS, NULL);
         if (h != INVALID_HANDLE_VALUE) {
                 if (!INIT_PROC_ADDR(kernel32.dll, GetFinalPathNameByHandleA)) {
-                        ptr = path;
                         goto end;
                 }