* the `GrabInProgress` field isn't used by any known drivers, thus
no need to export it
* the only in-tree consumer outside of it's source file is Xext/saver.c,
which actually just wants to know whether any *other* client already
grabbed the server - asking the OS layer isn't the right source
(should ask dix/dispatch.c instead)
Therefore adding a simple function for that check into dispatch.c (where
grab/ungrab is actually controlled), so we can easily make this internal
field static again.
Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
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