pbutils: don't assume LC_MESSAGES is always defined, also check for ENABLE_NLS

Should fix build with mingw32 build bot again.

gst-libs/gst/pbutils/encoding-target.c

@@ -412,9 +412,23 @@ serialize_stream_profiles (GKeyFile * out, GstEncodingProfile * sprof,
 static gchar *
 get_locale (void)
 {
-  const char *loc = setlocale (LC_MESSAGES, NULL);
+  const char *loc = NULL;
   gchar *ret;
 
+#ifdef ENABLE_NLS
+#if defined(LC_MESSAGES)
+  loc = setlocale (LC_MESSAGES, NULL);
+  GST_LOG ("LC_MESSAGES: %s", GST_STR_NULL (loc));
+#elif defined(LC_ALL)
+  loc = setlocale (LC_ALL, NULL);
+  GST_LOG ("LC_ALL: %s", GST_STR_NULL (loc));
+#else
+  GST_LOG ("Neither LC_ALL nor LC_MESSAGES defined");
+#endif
+#else /* !ENABLE_NLS */
+  GST_LOG ("i18n disabled");
+#endif
+
   if (loc == NULL || g_ascii_strncasecmp (loc, "en", 2) == 0)
     return NULL;