VirtualBox Video Driver install fix

I made some minor changes to to classint.c (reactos/dll/cpl/desk) to allow proper install
of the VirtualBox Guest Additions (version 7.0.12-159484)  VBoxVGA driver.   The
additional registery settings (SoftwareSettings section of the INF file) where not
installed with the VirtualBox Guest Addtions.
Would the project like me to commit the changes (via a Git pull request)?   The update is
25 lines of code.   

Thanks!

Bob