[dev] hourminutesecond rendering fix

[Jason M. Felice]

Quoting Duck <duck at obala.net>:

> with cvs from 23.3. when using "hourminutesecond" withouth the seconds part
> the render wont return the $html code. In Horde/UI/VarRenderer/html.php:323
> chenge "return;" to "return $html;". The returning html is missing.

Committed, thanks!

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  Jason M. Felice
  Cronosys, LLC <http://www.cronosys.com>
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