Summary:
SEG_FAULT happens when the object which has selection is deleted,
and new selection is done at another object.
Reason: loss_cb is not removed when the object which has selection is deleted.
When new selection is set for new object, the loss_cb is called for deleted
object. As result, SEG_FAULT happens.
Test Plan:
Run elementary test, open Entry, do selection,
close Entry window, open Entry one more time, do selection.
Reviewers: JackDanielZ
Differential Revision: https://phab.enlightenment.org/D2763
08509f56a2