audio mode load: gracefully handle mode files of wrong AEC version Irrespective of which AEC policy we adopt for FC Selenite (keep L1_NEW_AEC disabled like in Magnetite or enable it like in Tourmaline), we MUST gracefully handle the case of wrong AEC version on audio mode load: disable AEC instead of loading garbage. Therefore, we apply the same change to src/cs/services/audio/audio_mode_load.c as we made in Tourmaline and Magnetite last year.