Invalidate metaObject wrapper before deletion
Invalidate metaObject wrapper before deletion

Change-Id: I95d3f8dd4a8473849ca19b5c8d5d59dee4c42991
Reviewed-by: Hugo Parente Lima <e250cbdf6b5a11059e9d944a6e5e9282be80d14c@openbossa.org>

RobinD42/pyside,BadSingleton/pyside2,pankajp/pyside,M4rtinK/pyside-bb10,PySide/PySide,M4rtinK/pyside-bb10,M4rtinK/pyside-bb10,IronManMark20/pyside2,BadSingleton/pyside2,IronManMark20/pyside2,RobinD42/pyside,BadSingleton/pyside2,pankajp/pyside,PySide/PySide,enthought/pyside,enthought/pyside,RobinD42/pyside,BadSingleton/pyside2,qtproject/pyside-pyside,BadSingleton/pyside2,qtproject/pyside-pyside,RobinD42/pyside,IronManMark20/pyside2,gbaty/pyside2,RobinD42/pyside,qtproject/pyside-pyside,PySide/PySide,PySide/PySide,M4rtinK/pyside-bb10,RobinD42/pyside,enthought/pyside,gbaty/pyside2,gbaty/pyside2,M4rtinK/pyside-bb10,IronManMark20/pyside2,pankajp/pyside,PySide/PySide,M4rtinK/pyside-bb10,enthought/pyside,IronManMark20/pyside2,enthought/pyside,qtproject/pyside-pyside,pankajp/pyside,enthought/pyside,gbaty/pyside2,qtproject/pyside-pyside,RobinD42/pyside,gbaty/pyside2,pankajp/pyside,enthought/pyside