Summary:
- when deleted callback is found _edje_signal_callback_move_last() is called
in order to pack match array.
- during _edje_signal_callback_move_last() index skips when another deleted
callback is found, but does not reduce members_count.
- this duplicates a remaining callback and calls the callback twice.
Test Plan:
1. add multiple edje_signal_callback by edje_object_signal_callback_add()
which have the same source, signal, func but different data.
2. delete first and last callback by
edje_object_signal_callback_del/edje_object_signal_callback_del_full.
3. emit edje_signal.
4. observe one callback is called twice.
Reviewers: SanghyeonLee, conr2d, jpeg
Subscribers: cedric, jpeg
Differential Revision: https://phab.enlightenment.org/D4985
d545929845