Update functions.metaconfig.php

Fix for Warning Issue #402 https://github.com/shoestrap/shoestrap/issues/402

Warning: Wrong parameter count for round() lib/modules/core.entry-meta/functions.metaconfig.php on line 48

PHP versions lower than 5.3 show a warning about this use of round. In 5.3's version of "round()" it uses a 3rd parameter. Removing the 3rd parameter makes the warning go away in 5.2
Merge pull request #414 from MikeCooke/patch-1

Fixes #414