ugly png plots in 3.1.54

[Ben Abbott]

On Mar 13, 2009, at 10:48 PM, Francesco Potorti` wrote:

>> This should restore the old behavior.
>
> I tried it with "-S640,480" for both PNG and SVG, and without any  
> option
> for PNG, and I would say that everything looks good now, thanks.

Thanks for checking the fix.

If there are no objections I'll commit this change when over the  
weekend.

Ben