winex11drv: Return cached cursor_pos in GetCursorPos().

[Vitaliy Margolen]

Change Log:
  Return cached cursor_pos in GetCursorPos().
  Use "last_time_updated" to revert to old behavior or when mouse
   position hasn't been updated for some time.
  Don't change actual cursor position in SetCursorPos() if it hasn't changed.

We need change to SetCursorPos() to fix introduced timing issues with some games.
They pull cursor position with GetCursrorPos() then if cursor moved, reset it to
center with SetCursorPos(). If for some reason we get a bit behind, this will
result in almost no cursor movement in the game. In a sense we need to "cache"
both operations here.

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 dlls/winex11.drv/mouse.c |   18 ++++++++++++------
 1 files changed, 12 insertions(+), 6 deletions(-)
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