Elementary: cnp - check on NULL data in elm_drag_start
Summary:
check on NULL add in wayland elm_drag_start API
@fix
Test Plan: Call elm_grag_start with data = NULL under wayland
Reviewers: zmike, NikaWhite, jpeg
Reviewed By: NikaWhite, jpeg
Subscribers: bu5hm4n, myoungwoon, cedric, jpeg
Differential Revision: https://phab.enlightenment.org/D4119