xfwm4 commit 821ee7cc breaks all Qt and KDE programs

xfwm4 compiled with commit 821ee7cc makes all Qt and KDE program windows which have been moved open the menu where the menu would have opened at the windows original placement. xfwm4 up to commit ecabdea9 doesn't have that problem.

This is a pretty big deal since the vast majority of useful free software is made using Qt or KDE. This change makes that vast amount of good software practically unusable under Xfce. It would be very unfortunate if that change were to make it into a release.