E conf intl: Initialise basic_language variable.

Judging from the code it seems that this variable is supposed to be init to
NULL.

src/modules/conf_intl/e_int_config_intl.c

@@ -662,7 +662,7 @@ _fill_data(E_Config_Dialog_Data *cfdata)
 
              if (locale_parts)
                {
-                  char *basic_language;
+                  char *basic_language = NULL;
 
                   if (locale_parts->mask & E_INTL_LOC_REGION)
                     basic_language = e_intl_locale_parts_combine(locale_parts, E_INTL_LOC_LANG | E_INTL_LOC_REGION);