Check error code and value against NULL before adding to dictionary in AppController's |updateAudioDevices|.
Check error code and value against NULL before adding to dictionary in AppController's |updateAudioDevices|.

thierryc/Telephone,mralexgray/SwitchBoard,einfallstoll/Telephone,martinkero/Telephone,inz/Telephone,thinkski/Telephone,mobdim/Telephone,nriley/Telephone