dix: don't undisplay cursor if we don't own a sprite.
Sometimes we didn't have a cursor when coming back from suspend. Reason was that the suspend caused the server to lose the device that was attached to the VCP, and a RemoveDevice() would then set the cursor to NULL. Solution: only set the cursor to NULL if we actually own the sprite.
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@ -885,7 +885,8 @@ RemoveDevice(DeviceIntPtr dev)
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return BadImplementation;
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initialized = dev->inited;
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screen->DisplayCursor(dev, screen, NullCursor);
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if (DevHasCursor(dev))
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screen->DisplayCursor(dev, screen, NullCursor);
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deviceid = dev->id;
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DisableDevice(dev);
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