comctl32:rebar: Don't store an empty string in REBAR_InsertBandT.

[Sergey Khodych]

Nikolay Sivov пишет:

>> If a band has an empty string, wine allocates a padding space in
>> lpBand->rcCapText that causes an offset in a band.
> It looks like a workaround, if get/set text behaves ok now (no tests 
> exist I suppose) then
> the only place to be changed is this rectangle dimensions.
> 
Why does wine need to keep an empty string when native realization 
doesn't distinguish "" and NULL (according to tests)?