MDecoratorWindow::setInputRegion(): don't leak xrects
MDecoratorWindow::setInputRegion(): don't leak xrects

nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor,nemomobile-graveyard/mcompositor