[Lazarus] RE : @DBLookupControls users: call for test

[Ludo Brands]

> In order to fix some bugs i did significant changes in 
> TDBLookup[List|Combo]Box controls
> 
> I did a lot of testing but may broken something
> 
> Please report problems you have
> 
> Luiz
> 

Encountered a crash in dblookup.inc.
http://bugs.freepascal.org/view.php?id=20900
Easily reproducable but can't tell if this is related to recent changes. 

Ludo