Returns whether the supplied quest in the quest log is complete.
isComplete = IsQuestComplete(questID)
- number - The ID of the quest.
- boolean - true if the quest is both in the quest log and is complete, false otherwise.
- This function will only return true if the questID corresponds to a quest in the player's log. If the player has already completed the quest, this will return false.
- This can return true even when the "isComplete" return of GetQuestLogTitle returns false, if the quest in question has no objectives to complete.