Fix typo in viewconf.c
##### "TSCH_CONF_DEFAULT_TIMESLOT_LENGTH": _____ -> TSCH_DEFAULT_TIMESLOT_LENGTH
#endif
-#ifdef TSCH_CONF_SCHEDULE_DEFAULT_LENGTH
-##### "TSCH_CONF_SCHEDULE_DEFAULT_LENGTH": _____ == TSCH_CONF_SCHEDULE_DEFAULT_LENGTH
+#ifdef TSCH_SCHEDULE_CONF_DEFAULT_LENGTH
+##### "TSCH_SCHEDULE_CONF_DEFAULT_LENGTH": _____ == TSCH_SCHEDULE_CONF_DEFAULT_LENGTH
#else
-##### "TSCH_CONF_SCHEDULE_DEFAULT_LENGTH": _____ -> TSCH_CHEDULE_DEFAULT_LENGTH
+##### "TSCH_SCHEDULE_CONF_DEFAULT_LENGTH": _____ -> TSCH_SCHEDULE_DEFAULT_LENGTH
#endif
#else /* MAC_CONF_WITH_TSCH */
