[Fix][8465] Traveller system (fix a Z-axis exploit)

[Auntie Mangos]

* What bug does the patch fix? What features does the patch add?

Check Z-axis position for WorldObjects.

* For which repository revision was the patch created?

8456

* Is there a thread in the bug report section or at lighthouse? If yes, please add a link to the thread.

http://getmangos.eu/community/viewtopic.php?id=9652

* Who has been writing this patch? Please include either forum user names or email addresses.

me

http://paste2.org/p/411260

Note: This is my first patch, sorry if is a hack or have bad implementation

[goodbadguy]

Works great!

[ApoC]

Applied in [8465]

Thank You.

[xeross155]

Gratz on acceptance.