ivi-layout-transition: Standardize the check for layout_transition_register

Check the return from layout_transition_register in order to fix
potential leak of memory pointed to by transition. And don't register a
null transition.

Signed-off-by: Lucas Tanure <tanure@linux.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
1 file changed