MASA LTV crash issue fixes, OMASA+ISM msan fixes, MASA ext dirac render conv.

[x] Fixes for crash issues in MASA format:
   [MASA 1dir 1TC at 16.4 kbps, 48kHz in, 48kHz out, HOA3 out, random FER at 5%]
   [MASA 1dir 1TC bitrate switching from 13.2 kbps to 128 kbps, 48kHz in, 48kHz out, FOA out, JBM Prof 5]
   [MASA 1dir 1TC bitrate switching from 13.2 kbps to 128 kbps, 48kHz in, 48kHz out, FOA out]
   [MASA 1dir 2TC bitrate switching from 13.2 kbps to 512 kbps, 48kHz in, 16kHz out, BINAURAL out, JBM Prof 5]
   [MASA 2dir 2TC bitrate switching from 13.2 kbps to 512 kbps, 48kHz in, 16kHz out, BINAURAL out, JBM Prof 5]
   [MASA 1dir 1TC at 13.2 kbps, 48kHz in, 48kHz out, BINAURAL out, bandwidth switching]
[x] MSAN error fixes for OMASA, ISM
[x] MASA ext dirac render converted to fixed point.