silverstripe/silverstripe-framework — pull request #2152 by dhensby (2013-06-25 13:56:03+00:00)
Title: FIX Empty Datefield with defined min or max has non-object error thrown

When submitting a Datefield with no value but with a min / max config date, the validate() function attempts to access a function on $this->valueObj (which is a non-object)