[12549] Update spells 62374 and 62907

* limit spell targets of spell 62374
* implement spell effect for spell 62907
[12550] Add special condition id for Ulduar

Will be used to check the availability of the siege vehicles for players
[12551] Fix crash due to bad compiler

Close cmangos/issues#259

Signed-off-by: Xfurry <xfurry@scriptdev2.com>