BF: Fixed error when audioLib is None

[mdcutone]

Fixes an issue where the audio library key being specified as None instead of a string causes an error.

[codecov]

Codecov Report

Merging #6103 (502c92a) into dev (90998ba) will increase coverage by 1.44%.
Report is 3 commits behind head on dev.
The diff coverage is 42.85%.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #6103      +/-   ##
==========================================
+ Coverage   50.84%   52.29%   +1.44%     
==========================================
  Files         333      333              
  Lines       61313    61315       +2     
==========================================
+ Hits        31176    32063     +887     
+ Misses      30137    29252     -885     

Components	Coverage Δ
app	∅ <ø> (∅)
boilerplate	∅ <ø> (∅)
library	∅ <ø> (∅)
vm-safe library	∅ <ø> (∅)