CheckXWikiConfig : hardcoded xwikicfgdir and no warning when xwiki.cfg not found / wrong check report

I set the issue type to Bug because the tool reports a warning about xwiki encoding not being configured rather than reporting that xwiki.cfg is not found, letting the user in the belief that something is potentially wrong with his encoding settings.

I see in the code:

def xwikicfgdir = new
File("${appserverpath}/webapps/xwiki/WEB-INF/xwiki.cfg")
if (xwikicfgdir.exists()) {
  def content = Util.getFileContent(xwikicfgdir)
  def is = new ByteArrayInputStream(content.getBytes());
  def props = new Properties();
  props.load(is);
  xwencoding = props.get("xwiki.encoding")
  xwencryptkey = props.get("xwiki.authentication.encryptionKey")
} else {
  xwencoding = 'null'
  xwencryptkey = 'null'
}

'webapps/xwiki' part is hard-coded. Maybe there is no other choice but
at least the code should display something whenever the file is not
found. (else...)
Second, if there are hard-coded value like this why not doing a define
in the heading of the page code ? Like "def webappdir =
'/webapps/ROOT'" with a nice comment then use that var in the
corresponding code section ?