win32: fix 'cd' to symlink with relative path as target

Commit 69d328022 (win32: track current directory of mapped drives)
replaced a call to xmalloc_realpath() with one to xmalloc_readlink().

This was incorrect.  Although the argument is now guaranteed to
be a symlink it's still necessary to resolve it to an absolute path.
Otherwise the fix in commit 585d17d26 (win32: canonicalize path in
chdir(2)) doesn't work for symlinks with a relative path as their
target.

(GitHub issue #147)

1 files changed, 1 insertions, 1 deletions

diff --git a/win32/mingw.c b/win32/mingw.c
index d6b725e17..5601d8428 100644
--- a/win32/mingw.c
+++ b/win32/mingw.c
@@ -1453,7 +1453,7 @@ int mingw_chdir(const char *dirname)
         const char *realdir = dirname;
 
         if (is_symlink(dirname)) {
-                realdir = auto_string(xmalloc_readlink(dirname));
+                realdir = auto_string(xmalloc_realpath(dirname));
                 if (realdir)
                         fix_path_case((char *)realdir);
         }