g_free() is NULL-safe.
This allow us to use to 'leaks' detector to check if those objects are leaked. Differential Revision: https://phabricator.freedesktop.org/D1232
Summary: That is a new tool that uses ssim algorithm to compare images + Add a GstValidateVideo internal library adding an helper Gssim class Depends on D210 Reviewers: Mathieu_Du Differential Revision: http://phabricator.freedesktop.org/D211