Reason for r37370 of qt4-mac

[Marcus Calhoun-Lopez]

In http://trac.macports.org/changeset/37370, the plugin behavior of
qt4-mac was changed
"to prevent a resource leak."

I have a port of QT Creator, but r37370 is an impediment.
Without r37370, the port is trivial.

The person who made the changes was removed as a maintainer
(http://trac.macports.org/changeset/59699).
I would like to remove the change to facilitate QT Creator, but I do
not fully understand why it was made in the first place.

Does anyone have any insights?

Thanks,
Marcus