Edited Issue: getOffset failes with SymbolException [12145]

getOffset failes with error
"SymbolException: failed to find module for symbol: xxx"

```
>>>getOffset("PsLoadedModuleList")
SymbolException: failed to find module for symbol: PsLoadedModuleList

>>>getOffset("nt!PsLoadedModuleList")
success

>>> nt = module("nt")
>>> nt.offset( "PsLoadedModuleList")
success

```