Fix RGB24_TO_VDPCOLOR so it does what it says
Fix RGB24_TO_VDPCOLOR so it does what it says

andwn/SGDK,andwn/SGDK,clbr/SGDK,clbr/SGDK,andwn/SGDK,Stephane-D/SGDK,clbr/SGDK,Stephane-D/SGDK,clbr/SGDK,Stephane-D/SGDK