contributing: add note about events that destroy objects
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@ -293,9 +293,13 @@ this correctly.
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Object structs should only be destroyed when their resource is destroyed, ie.
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in the resource destroy handler (set with `wl_resource_set_implementation`).
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Destructor requests should only call `wl_resource_destroy`.
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The compositor should not destroy resources on its own.
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- If the object has a destructor request: the request handler should just call
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`wl_resource_destroy` and do nothing else. The compositor must not destroy
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resources on its own outside the destructor request handler.
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- If the protocol specifies that an object is destroyed when an event is sent:
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it's the only case where the compositor is allowed to send the event and then
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call `wl_resource_destroy`. An example of this is `wl_callback`.
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### Inert resources
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