! comma_format was not formating numbers at all

Signed-off-by: John Rayes <live627@gmail.com>

Themes/default/languages/index.english.php

@@ -18,6 +18,8 @@ $txt['lang_character_set'] = 'ISO-8859-1';
 $txt['lang_rtl'] = false;
 // Capitalize day and month names?
 $txt['lang_capitalize_dates'] = true;
+// Number format.
+$txt['number_format'] = '1,234.00';
 
 $txt['days'] = array('Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday');
 $txt['days_short'] = array('Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat');