WowAce

What steps will reproduce the problem?
1. Hover tooltip.

What is the expected output?
- normal tooltip contents

What do you see instead?
- LUA error

What version of the product are you using?
1.6.1

Do you have an error log of what happened?
Message: [string "local lhs, rhs = ......"]:38: attempt to index field 'shipment' (a nil value)
Time: Wed Jan  7 01:08:22 2015
Count: 2
Stack: (tail call): ?
[C]: ?
[string "local lhs, rhs = ......"]:38: in main chunk
[C]: in function `sort'
Interface\AddOns\Broker_Garrison\helper.lua:99: in function <Interface\AddOns\Broker_Garrison\helper.lua:95>
(tail call): ?
Interface\AddOns\Broker_Garrison\core.lua:1254: in function <Interface\AddOns\Broker_Garrison\core.lua:877>
Interface\AddOns\Broker_Garrison\core.lua:1432: in function <Interface\AddOns\Broker_Garrison\core.lua:1431>
Interface\AddOns\Titan\LDBToTitan.lua:327: in function <Interface\AddOns\Titan\LDBToTitan.lua:286>

Locals: (*temporary) = true
(*temporary) = <function> defined =[C]:-1