[glib/mcatanzaro/xdgmime-corruption] xdgmime: fix double free

[Michael Catanzaro <mcatanzaro src gnome org>]

commit f95ca6cb713383548f16f9a8ba2f6c51a4d25e25
Author: Michael Catanzaro <mcatanzaro redhat com>
Date:   Fri Jun 17 08:48:10 2022 -0500

    xdgmime: fix double free
    
    We free xdg_dirs[i] twice, but fail to free xdg_dirs itself.
    
    Also, since free() is NULL-safe, there is no need for the second check
    here.
    
    Discovered in: https://gitlab.freedesktop.org/xdg/xdgmime/-/merge_requests/16#note_1432025

 gio/xdgmime/xdgmime.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/gio/xdgmime/xdgmime.c b/gio/xdgmime/xdgmime.c
index 9ab6760486..c3c11625e8 100644
--- a/gio/xdgmime/xdgmime.c
+++ b/gio/xdgmime/xdgmime.c
@@ -350,8 +350,7 @@ xdg_mime_set_dirs (const char * const *dirs)
 
   for (i = 0; xdg_dirs != NULL && xdg_dirs[i] != NULL; i++)
     free (xdg_dirs[i]);
-  if (xdg_dirs != NULL)
-    free (xdg_dirs[i]);
+  free (xdg_dirs);
   xdg_dirs = NULL;
 
   if (dirs != NULL)