[jokosher-devel] Event.py - divide by zero

["Charles R. McCreary" <charles mccreary crmeng com>]

I turned my daughters onto Jokosher when they asked me how they could 
make mixes for their friends. I remembered Jono Bacon's posts on my 
Ubuntu blog feed, so we gave it a whirl. We found 0.1 from the 
repositories to be too unstable. 0.2 proved  to work well enough for 
them to get started. My 13 year old daughter jumped right in.

They spent a few hours last night making mixes but they were unable to 
re-open their project. I fired it up in the console and received a 
divide by zero traceback. So I fired it up again in WingIDE in passive 
mode and found the following:

In __UpdateFadeLevels, line 754, levelsInThisSection is 0. Examining the 
contents of self.audioFadePoints, it is clear why there is a divide by zero,

self.audioFadePoints:

[(0.0, 1.0), (14.0688, 1.0), (18.815999999999999, 0.22431372549), 
(20.172799999999999, 0.050000000000000003), (20.188800000000001, 0.0)]

It looks to me like my daughter created bogus fade points. The creation 
of an erroneous pair should be trapped, of course, but I need to recover 
from this error so they can reclaim their project. What would be a good 
fix? I'm going to kludge it so that levelsInThisSection is non zero for now.