Look up all atoms of interest in clipboard code in winClipboardProc() and pass
them down.
This avoids the need to check serverGeneration to notice when we need to
invalidate cached atom values.
Also consistently use cached atom values everywhere, rather than sometimes just
doing XInternAtom() again.
Remove WIN_LOCAL_PROPERTY as unused now, as we only refer to CYGX_CUT_BUFFER
once and do that directly.
Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Reviewed-by: Colin Harrison <colin.harrison@virgin.net>
e1cf2b47be