#2 Intermittent crash because of out-of-bounds array access

[Paul Licameli]

Report of the problem:

http://forum.audacityteam.org/viewtopic.php?f=68&t=98199&p=340269#p340269

Discussion of the problem:

https://sourceforge.net/p/audacity/mailman/message/36180386/

Fix of the problem:

https://github.com/audacity/audacity/commit/df1d9a08fe9aa2c62fc98862028ca9371b8f6169