• bug_actiongroup_page.php: replace a print_meta_redirect() + exit() with a
  call to print_header_redirect()

• signup_page.php: remove an unnecessary exit() call after printing a
  redirect header

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@1743 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9