Description of problem:
Locales starting with char 'C' are not correctly detected from the LANG environment variable.

Version-Release number of selected component (if applicable):
2.0.13-1.fc10

How reproducible:
E.g. on Tomboy application.

Steps to Reproduce:
1. export LANG=cs_CZ.UTF-8
2. tomboy
  
Actual results:
Czech spellchecker not working in Tomboy.

Expected results:
Czech spellchecker working in Tomboy.

Additional info:
Seems to be caused by following part of code in gtkspell.c

static gboolean
gtkspell_set_language_internal(GtkSpell *spell, const gchar *lang, GError **error) {

	if (lang == NULL) {
		lang = g_getenv("LANG");
		if (lang) {
			if (g_strncasecmp(lang, "C", 1) == 0)
				lang = NULL;
			else if (lang[0] == 0)
				lang = NULL;