[glib/fix-uninitialized-use] timezone: Fix an uninitialized use

[Matthias Clasen <matthiasc src gnome org>]

commit 099297820220a9a22457ee55da6c068db8009cc6
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Jul 31 14:04:21 2020 -0400

    timezone: Fix an uninitialized use
    
    GTK ci rightly complains about this when ti builds
    GLib as a subproject with -Werror=maybe-uninitialized.
    
    subkey_dynamic_w will be freed without being initialized
    when the first goto is taken.

 glib/gtimezone.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/glib/gtimezone.c b/glib/gtimezone.c
index 7c1187371..8e0621e54 100644
--- a/glib/gtimezone.c
+++ b/glib/gtimezone.c
@@ -831,6 +831,8 @@ rules_from_windows_time_zone (const gchar   *identifier,
   WCHAR winsyspath[MAX_PATH];
   gunichar2 *subkey_w, *subkey_dynamic_w;
 
+  subkey_dynamic_w = NULL;
+
   if (GetSystemDirectoryW (winsyspath, MAX_PATH) == 0)
     return 0;