Fix for LTV crash [stereo at 48 kbps, 16 kHz in, 16 kHz out, DTX on, JBM Prof 5]

EVS 26.444 BE test passes.
pytests results: 597 failed, 381 skipped

MLD scores:
Original inputs:
MLD > 10: 81
MLD > 5 : 146
MLD < 5 : 370

+10dB inputs:
MLD > 10: 216
MLD > 5 : 198
MLD < 5 : 182

-10dB inputs:
MLD > 10: 31
MLD > 5 : 92
MLD < 5 : 474