elm elm_clock.h: Fixed documentation typo.
elm elm_clock.h: Fixed documentation typo.

SVN revision: 78400

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