[fofix-gcode-issuetracker] Issue 1274 in fofix: Tracks other than 'song' cannot be loaded

[fofix at googlecode.com]

Comment #7 on issue 1274 by alexots... at gmail.com: Tracks other than 'song'  
cannot be loaded
http://code.google.com/p/fofix/issues/detail?id=1274

i applied the patch, no more "(pygame parachute) Floating Point Exception",  
but now it says "Unable to load guitar track: 'NoneType' object has no  
attribute '__getitem__'". So no guitar sound... I tried to figure out the  
cause of this. It semms that there is a  __getitem__  only in song.py and  
shader.py.. Obviously we are concerned about the Song.py.
I'll try to fix this. Thanks for the patch anyway!