Jonas Dreßler d9fb6b5ca2 wayland/surface: Connect to "output-destroyed" in surface_entered_output
Since we're now connecting to one more signal of MetaWaylandOutput, keep
signal connections in one place and move connecting the
"output-destroyed" signal to surface_entered_output() and disconnecting
it to surface_left_output().

This also allows us to use the "outputs_to_destroy_notify_id" as a
simple set and rename it to "outputs".

While at it, also use g_hash_table_destroy() instead of
g_hash_table_unref() since destroy is more clear than unref and does the
same thing in this case.

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1230
2020-05-11 18:06:58 +00:00
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