Several small misc fixes
Changes proposed:
- Fixed meta gem activation requirements. DBC structure was bad for 434
- Minor logic fix in Player::CanUseItem
- Fixed area phases not correctly honoring zone ID as well as area ID
- Fixed SPELL_AURA_FIXATE
- Fixed SMSG_POWER_UPDATE, client no longer reports wrong power amount
- Fixed Battle.net login
- Fixed talent spec not loading correctly on login
Tests performed: All fixes tested ingame