One example to clarify: for the "destroyed(QObject* = 0)" signal,
"obj.destroyed.connect(...)" connects to "destroyed()", and
"obj.destroyed[QObject].connect(...)" connects to "destroyed(QObject*)".
Reviewed by Lauro Moura <lauro.neto@openbossa.org>
Reviewed by Luciano Wolf <luciano.wolf@openbossa.org>