Fix crash when attempting to sort a grid on lync users form.
Fix crash when attempting to sort a grid on lync users form.

titan68/Websitepanel,berkut1/Websitepanel,berkut1/Websitepanel,trevski/Websitepanel,humanbeen/Websitepanel,titan68/Websitepanel,trevski/Websitepanel,ExpertServices/Websitepanel,simonegli8/Websitepanel,humanbeen/Websitepanel,simonegli8/Websitepanel,titan68/Websitepanel,trevski/Websitepanel,ExpertServices/Websitepanel,berkut1/Websitepanel,simonegli8/Websitepanel,vfedosevich/Websitepanel,simonegli8/Websitepanel,berkut1/Websitepanel,ExpertServices/Websitepanel,vfedosevich/Websitepanel,vfedosevich/Websitepanel,vfedosevich/Websitepanel,humanbeen/Websitepanel,ExpertServices/Websitepanel,titan68/Websitepanel,trevski/Websitepanel,humanbeen/Websitepanel