• When the string corresponding to a specified id (i.e. 60) is not found in
  the specified enumeration show @60@ instead of @null@.
• $g_lang_current was not available to custom_strings_inc.php. This is
  important to allow custom strings to override the strings based on the current
  language.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@1973 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9