From Valeri Fine

Fix one more problem with QT4 when configuring.
see: http://root.cern.ch/phpBB2/viewtopic.php?t=5677
In addition it allows to build Qt layer against of the "debug" version of Qt4 on Win32 platform.


git-svn-id: http://root.cern.ch/svn/root/trunk@20628 27541ba8-7e3a-0410-8455-c3a389f83636