-extern int vid_hidden;
-extern int vid_activewindow;
-extern int vid_allowhwgamma;
-extern int vid_hardwaregammasupported;
-extern int vid_usinghwgamma;
+extern qboolean vid_hidden;
+extern qboolean vid_activewindow;
+extern cvar_t vid_hardwaregammasupported;
+extern qboolean vid_usinghwgamma;