Empty strings in temporal setters yield current time

[hans]

Here's the scenario:

$obj->setDate("");

(obviously doesn't make any sense, but this can happen -- especially when populating form form field)

Currently that will be equivalent to the following:

$obj->setDate(new DateTime("now"));

since

(new DateTime('')) == (new DateTime('now'))

I would argue that this is a bit counter-intuitive. I think it might be more intuitive to have empty strings get treated as null by the mutator (setDate(), in this case).

[hans]

This has been fixed in r982.