[glib] Protect against strcmp() on NULL strings

[Sebastian DrÃge <sdroege src gnome org>]

commit 058fa6393e368a2134f18df3296c09eb33d8e951
Author: Sebastian DrÃge <sebastian droege collabora co uk>
Date:   Wed Nov 28 16:25:43 2012 +0100

    Protect against strcmp() on NULL strings

 glib/ggettext.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/glib/ggettext.c b/glib/ggettext.c
index ed7137e..79abf0c 100644
--- a/glib/ggettext.c
+++ b/glib/ggettext.c
@@ -335,10 +335,11 @@ _g_dgettext_should_translate (void)
        *   - If locale is "C", maybe user calls setlocale(LC_ALL,"") later.
        *     Continue with old behavior of translating.
        */
-      if (0 != strcmp (default_domain, "messages") &&
+      if (!default_domain || !translator_comment || !translate_locale ||
+          (0 != strcmp (default_domain, "messages") &&
           '\0' == *translator_comment &&
           0 != strncmp (translate_locale, "en_", 3) &&
-          0 != strcmp (translate_locale, "C"))
+          0 != strcmp (translate_locale, "C")))
         should_translate = FALSE;
 
       g_once_init_leave (&translate,