GetQuestObjectives returns nil for quests with no trackable objectives
on WotLK private servers. The original code set hasInvalidObjective=true
but left isQuestLogGood=true, causing goodQuestsCount to stay 0 while
numQuests was 19 -> 'Good quest: 0/19' error on every login/reload.
Treat a non-table return as an empty valid objective list. Demote the
Questie:Error to Questie:Debug so it doesn't spam chat.
Xurkon