fix various trivial null derefs
Summary:
CIDs 1401081, 1401044, 1400983, 1400960, 1400927, 1400799, 1396946, 1396944,
1383851, 1383847, 1382211, 1379921, 1379921
Reviewers: cedric
Reviewed By: cedric
Subscribers: #reviewers, #committers
Tags: #efl
Differential Revision: https://phab.enlightenment.org/D10452