#231 QwtPlotCurve::setBrush() removes item from the legend

[Sintegrial Technologies]

Hi Everybody,

there is a bug spotted in Qwt 6.1:
call to QwtPlotCurve::setBrush() results in removing curve's item from the legend.

[Uwe Rathmann]

Did a quick check with Qwt 6.1 from SVN and can't confirm the effect.

So please upload a small compilable demo demonstrating a situation, where it happens.