fix idempotent check define as noticed by LLVM.

work around a local change that enables drivers to work.

see 'const' commented in xorg-server/dist/hw/xfree86/common/xf86xv.h.
maybe we can clean this up properly now most drivers are updated.

merge xf86-video-ark 0.7.6, xf86-video-s3virge 1.11.1,
xf86-video-trident 1.4.0, and xf86-video-vmware 13.4.0.

initial import of xf86-video-vmware-13.4.0

fix various errors and warnings with xorg-server 1.20:

- no Error() in scope
- more wakeup/blockhandler ABI changes
- more notify fd API changes
- more xf86CursorResetCursor changes
- lots of char* -> const char*
- fix ati kms config.h now HAVE_XF86_CURSOR_RESET_CURSOR is available
- another xf86GetOS() is removed fix
- OsBlockSIGIO() etc, -> old, but still around API until properly converted
- don't free const char * data owned by some other system

initial import of xf86-video-vmware-13.2.1

xf86GetOptValString() returns const char *

initial import of xf86-video-vmware-13.1.0

initial import of xf86-video-vmware-13.0.2

merge xf86-video-vmware 13.0.1

initial import of xf86-video-vmware-13.0.1

merge xf86-video-vmware 11.0.3

initial import of xf86-video-vmware-11.0.3

merge xf86-video-vmware-11.0.2

initial import of xf86-video-vmware-11.0.2

avoid vmware module crashing with "X -configure".

avoid a #define redefine warning (error)

initial import of xf86-video-vmware-11.0.1

initial import of xf86-video-vmware-10.16.8

initial import of xf86-video-vmware-10.16.7

initial import of xf86-video-vmware-10.16.6

initial import of xf86-video-vmware-10.16.1