Core/SmartScripts: Implement SMART_ACTION_PLAY_CINEMATIC

By Malcrom

src/server/game/AI/SmartScripts/SmartScriptMgr.cpp

@@ -1623,6 +1623,7 @@ bool SmartAIMgr::IsEventValid(SmartScriptHolder& e)
         case SMART_ACTION_SPAWN_SPAWNGROUP:
         case SMART_ACTION_DESPAWN_SPAWNGROUP:
         case SMART_ACTION_STOP_MOTION:
+        case SMART_ACTION_PLAY_CINEMATIC:
             break;
         default:
             TC_LOG_ERROR("sql.sql", "SmartAIMgr: Not handled action_type(%u), event_type(%u), Entry %d SourceType %u Event %u, skipped.", e.GetActionType(), e.GetEventType(), e.entryOrGuid, e.GetScriptType(), e.event_id);