[totem/wip/hadess/und-lang] menu: Fix "Undetermined" appearing in menu items

[Bastien Nocera <hadess src gnome org>]

commit d41687758f8ef052fbd8d25077e20963295916a4
Author: Bastien Nocera <hadess hadess net>
Date:   Thu Sep 17 17:39:08 2020 +0200

    menu: Fix "Undetermined" appearing in menu items
    
    Due to recent changes in gst-plugins-base, some languages without a 2
    letter-code are now getting mapped to languages using
    gst_tag_get_language_name(). Which isn't a problem, except that we were
    relying on gst_tag_get_language_name("und") returning NULL.
    
    Check for "und" manually so that track menus get named properly.
    
    See https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/785

 src/totem-menu.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/src/totem-menu.c b/src/totem-menu.c
index 20b9764db..42bc93019 100644
--- a/src/totem-menu.c
+++ b/src/totem-menu.c
@@ -397,9 +397,11 @@ static const char *
 get_language_name_no_und (const char   *lang,
                          BvwTrackType  track_type)
 {
-       const char *ret;
+       const char *ret = NULL;
+
+       if (g_strcmp0 (lang, "und") != 0)
+               ret =  gst_tag_get_language_name (lang);
 
-       ret =  gst_tag_get_language_name (lang);
        if (ret != NULL)
                return ret;