Runtime in s Fix to MM:SS

edit all *.tpl

{assign var=viddur value=$answers[i].duration}
{math equation="$viddur/60" format="%0.0f" assign=minutes}
{math equation="$viddur - ($minutes * 60)" format="%0.0f" assign=seconds}
{if $seconds < 0}
{math equation="$minutes - 1" assign=minutes}
{math equation="$seconds + 60" assign=seconds}
{/if}
{$minutes}:{$seconds}