fix for 0004578: Can't delete administration account without email/name

• initial administrator account had an invalid email address if
  address validation was on.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@3466 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9