Due to race conditions, it is (vanishingly unlikely but) possible to receive a wl_pointer.enter event referring to a wl_surface we have just destroyed. If this happens, wl_surface will be NULL. Detect this, clear out our focus, and return. Other pointer and keyboard events are robust against destroyed surfaces. Signed-off-by: Daniel Stone <daniels@collabora.com> Cc: Pekka Paalanen <pekka.paalanen@collabora.co.uk> [Pekka: remove call to input_set_cursor()] Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>dev
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