part of fix for bug 6588; added x-user-defined charset to lang group table;

r=none

intl/uconv/src/charsetData.properties

@@ -63,6 +63,7 @@ iso-8859-7.LangGroup        = el
 iso-8859-9.LangGroup        = tr
 koi8-r.LangGroup            = x-cyrillic
 utf-8.LangGroup             = x-unicode
+x-user-defined.LangGroup    = x-user-def
 us-ascii.LangGroup          = x-western
 windows-1250.LangGroup      = x-central-euro
 windows-1251.LangGroup      = x-cyrillic
@@ -82,4 +83,4 @@ iso-8859-8.notForBrowser    = true
 windows-1255.notForBrowser  = true
 windows-1256.notForBrowser  = true
 ibm862.notForBrowser        = true
-ibm864.notForBrowser        = true
+ibm864.notForBrowser        = true