elm_flipselector.c: ELM_SAFE_FREE adoption.
elm_flipselector.c: ELM_SAFE_FREE adoption.

I splited ELM_SAFE_FREE refactoring patches. One commit per each file as recommended.
For the detail, please refer 3072dab12f12fe83fb5a628d15efd5cded11787f.

tasn/elementary,rvandegrift/elementary,FlorentRevest/Elementary,tasn/elementary,FlorentRevest/Elementary,tasn/elementary,rvandegrift/elementary,FlorentRevest/Elementary,tasn/elementary,rvandegrift/elementary,tasn/elementary,rvandegrift/elementary,FlorentRevest/Elementary