[matplotlib-devel] Bug in ticker.py

Hi,

I'm posting this to the mailing list first because I'm not sure I've 
fixed this correctly.  This is a patch for a bug in ticker.py.

In Autolocator.get_locator, if the distance passed in is 0, the call to 
log10 will crash with an overflow error.  I think I'm hitting this 
problem because I plot a lot of binary data, and the first plot when 
this happened, consisted of all zeros (giving the y axis no distance - I 
could be talking complete nonsense, I haven't really examined the 
code).  What I'm not sure about is, in the case that distance is 0, 
should the variable ld be set to 0 (as I have done in the attached 
patch), or is another value more sensible?

thanks,
David Moore