[ros-dev] Patch up for testing

[Ge van Geldorp]

> From: Hartmut Birr
> 
> Ge van Geldorp wrote:
> 
> >The only issue I know of is that this patch will cause increased 
> >display corruption when using the Cirrus driver in QEmu. I 
> >believe this is only a symptom of a deeper problem we have with
> >the Cirrus driver.
> 
> It seems that some source objects (bitmaps or memory dcs)  
> are created with negative size values. Our own 
> bitblt-functions check the clipping region and does discard 
> such sources. The cirrus driver doesn't do this.

r16018 should fix the paint and crash problems with the Cirrus driver.

Gé van Geldorp.