Torts — Premises liability — Open and obvious danger — Uneven floor levels — Action arising out of injury suffered at skating rink which was allegedly caused by an improper and unmarked change in elevation between the skating rink floor and the building’s sub floor — No error in granting summary judgment in favor of defendant, as uneven floor levels in public places, by themselves, do not constitute latent, hidden, or dangerous conditions — Because the uneven floor level constituted an open and obvious danger, defendant had no duty to warn of the difference in floor levels — Dim lighting does not transform an otherwise obvious change in floor elevation into a latent danger