LTV crash issue fix for stereo, OMASA formats and float code cleanup

[x] LTV crash fix for stereo format streams caused due to incorrect table values and intermediate float to fix conversions
    [stereo at 16.4 kbps, 32kHz in, 16kHz out, DTX on]
    [stereo at 16.4 kbps, 32kHz in, 16kHz out, random FER at 5%, DTX on]
    [stereo at 13.2 kbps, 32kHz in, 32kHz out, DTX on, random FER at 5%, bandwidth switching]
    [stereo at 16.4 kbps, 16kHz in, 16kHz out, DTX on, random FER at 5%]
    [stereo at 32 kbps, 48kHz in, 48kHz out, DTX on, random FER at 5%, bandwidth switching]
    [stereo bitrate switching from 13.2 kbps to 128 kbps, 32kHz in, 32kHz out]
[x] LTV crash fix for OMASA and MASA formats.
    [OMASA 1Dir1TC 4ISM at br sw techs 13.2 to 512 kbps start 32 kbps, 48kHz in, 48kHz out, BINAURAL out, JBM Prof 5]
    [OMASA 1Dir2TC 4ISM at br sw techs 13.2 to 512 kbps start 80 kbps, 48kHz in, 48kHz out, FOA out, JBM Prof 5]
    [MASA 1dir 2TC bitrate switching from 13.2 kbps to 512 kbps, 48kHz in, 16kHz out, BINAURAL out, JBM Prof 5]
[x] Float code clean up in init_dec_fx.c, dirac dec and dirac lib_rend files