problem with math funciton in 2.6.4 stable

Hi,

I had a problem with a math function: (2.6.4 stable)

   var session_time = {$sys_lifetime*1000};
   var session_time2 = {$sys_lifetime};

gets compiled to:

   var session_time = ;
   var session_time2 = <?php echo 
((is_array($_tmp=$this->_tpl_vars['sys_lifetime'])) ? 
$this->_run_mod_handler('modify_quotehtml', true, $_tmp) : 
modify_quotehtml($_tmp)); ?>


Using the latest dev-version from cvs it works again as in 2.6.3 stable:

   var session_time = <?php echo 
((is_array($_tmp=$this->_tpl_vars['sys_lifetime']*1000)) ? 
$this->_run_mod_handler('modify_quotehtml', true, $_tmp) : 
modify_quotehtml($_tmp)); ?>
;
   var session_time2 = <?php echo 
((is_array($_tmp=$this->_tpl_vars['sys_lifetime'])) ? 
$this->_run_mod_handler('modify_quotehtml', true, $_tmp) : 
modify_quotehtml($_tmp)); ?>
;


bye
tom