Encoder crash for OSBA ISM2SBA2 and ISM2SBA3 at 16.4kbps in gain_enc_uv_fx()

Basic info

• Float reference:
  • Encoder (float):
  • Decoder (float):
• Fixed point:
  • Encoder (fixed): ca5e99f0
  • Decoder (fixed):

Bug description

The fixed point encoder crashes with an assert:

Assertion failed: (0), function L_add, file basop32.c, line 1784.

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1168

./IVAS_cod_fx -q -ism_sba 2 2 ISM2SBA2_3-obj_River01_A_ambiX4_HOA3.0.csv ISM2SBA2_3-obj_River01_A_ambiX4_HOA3.1.csv -max_band WB 16400 16 ISM2SBA2_3-obj_River01_A_ambiX4_HOA3_16.-10dB.wav bit