[PATCH 1/2] winex11.drv: Use ClipCursor to grab/ungrab the pointer.

[Vitaliy Margolen]

Re-diffed against HEAD.

Try 6: Ungrab pointer on window destruction. Move some more code into helper.
Try 5: Combined with ClipCursor.
Try 4: Rewrote whole thing using helper function and switching_to static var to
deal with races.
Try 3: No recursion, don't export mouse_grab_pointer.
Try 2: Use more locking.
---
 dlls/winex11.drv/event.c  |    3 +
 dlls/winex11.drv/mouse.c  |  121 ++++++++++++++++++++++++++++++++++++++++++++-
 dlls/winex11.drv/window.c |    6 ++
 dlls/winex11.drv/x11drv.h |    5 ++-
 4 files changed, 133 insertions(+), 2 deletions(-)
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