[surf] patch to remove resizing if small

The most annoying feature of surf for me has been that when the 
window gets quite small suddenly everything is zoomed to a tiny and 
unreadable size. This can be a pain if for example I want to keep a 
couple of lines of text visible, and devote the rest to some other 
window. Given that it's so small, I can't see a useful use-case for 
the code, as the text is always thoroughly unreadable.

So, here is a patch to tip removing it. I think it should be applied 
to tip by somebody with Power.

Nick