xwayland: Handle NULL xwl_seat in xwl_seat_can_emulate_pointer_warp
This can happen e.g. with weston's headless backend.
Reviewed-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit e33453f911
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@ -2783,11 +2783,16 @@ xwl_seat_create_pointer_warp_emulator(struct xwl_seat *xwl_seat)
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static Bool
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xwl_seat_can_emulate_pointer_warp(struct xwl_seat *xwl_seat)
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{
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struct xwl_screen *xwl_screen = xwl_seat->xwl_screen;
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struct xwl_screen *xwl_screen;
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if (!xwl_seat)
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return FALSE;
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if (!xwl_seat->pointer)
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return FALSE;
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xwl_screen = xwl_seat->xwl_screen;
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if (!xwl_screen->relative_pointer_manager)
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return FALSE;
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