smarty.inc.php:

- cleanup flash messages after displaying them

This fixes
https://sourceforge.net/tracker/?func=detail&aid=3232174&group_id=191583&atid=937964
reported by john doe (johndoe64@SF)


git-svn-id: https://svn.code.sf.net/p/postfixadmin/code/trunk@1048 a1433add-5e2c-0410-b055-b7f2511e0802

smarty.inc.php

@@ -28,6 +28,7 @@ class PFASmarty {
 
     public function display($template) {
         $this->template->display($template);
+        unset($_SESSION['flash']); # cleanup flash messages
     }
     /**
      * Recursive cleaning of data, using htmlentities - this assumes we only ever output to HTML and we're outputting in UTF-8 charset