[texworks] Minor bug in Preview

[Jonathan Kew]

On 21 Jul 2009, at 23:07, Bruno Voisin wrote:

> Imagine you've got this (on the Mac, TeXworks r333):
>
> <Image 1.png>
>
>
> And you press the green Magnify button near the top left corner of  
> the window. You'll get something like that:
>
> <Image 2.png>
>
>
> Namely a white unrendered area starting at the previously hidden  
> part of the previewed document.
>
> Bruno Voisin

Wow.... yes, that happens here too. I'm amazed this hasn't been  
noticed/reported before.... or maybe it is due to a recent Qt change.  
Anyhow, I have added an explicit refresh in r338, so it should be  
fixed when a new build appears.

Thanks,

Jonathan