Changed Lithuanian encoding in order to make it mbstring compatible.

functions/i18n.php

@@ -457,8 +457,8 @@ if ( file_exists( SM_PATH . 'locale/th_TH') ) {
 }
 if ( file_exists( SM_PATH . 'locale/lt_LT') ) {
     $languages['lt_LT']['NAME']    = 'Lithuanian';
-    $languages['lt_LT']['CHARSET'] = 'windows-1257';
-    $languages['lt_LT']['LOCALE'] = 'lt_LT.CP1257';
+    $languages['lt_LT']['CHARSET'] = 'iso-8859-4';
+    $languages['lt_LT']['LOCALE'] = 'lt_LT.ISO-8859-4';
     $languages['lt']['ALIAS'] = 'lt_LT';
 }
 if ( file_exists( SM_PATH . 'locale/sl_SI') ) {