Decoder crash for OMASA ISM4_1TC / ISM4_2TC with bitrate switching and FER in enhancer_ivas_fx2()
# Basic info
<!--- Add commit SHA used to reproduce -->
- Encoder (float): d18cbee3
- Decoder: 8f97e97c
# Bug description
The fixed point decoder crashes with an assert for the [complexity job:](https://forge.3gpp.org/rep/sa4/audio/ivas-basop/-/jobs/339893#L2725)
```bash
Assertion failed: (0), function L_mult, file basop32.c, line 1133.
```



# Ways to reproduce
Bitstreams:
- [ltv48_OMASA_4ISM_2TC_OMASA_ISM4_2TC_ball_fb_rs_fer_ep_10pct_fer_g192.192.zip](/uploads/8ec13822c1d21be9cdc569c9782bc25e/ltv48_OMASA_4ISM_2TC_OMASA_ISM4_2TC_ball_fb_rs_fer_ep_10pct_fer_g192.192.zip)
- [ltv48_OMASA_4ISM_1TC_OMASA_ISM4_1TC_ball_fb_rs_fer_ep_10pct_fer_g192.192.zip](/uploads/0937472bd39db4db6fedde391e9d04ae/ltv48_OMASA_4ISM_1TC_OMASA_ISM4_1TC_ball_fb_rs_fer_ep_10pct_fer_g192.192.zip)
```bash
IVAS_cod -ism_masa 4 2 ltv48_OMASA_4ISM_2TC_ISM1.csv ltv48_OMASA_4ISM_2TC_ISM2.csv ltv48_OMASA_4ISM_2TC_ISM3.csv ltv48_OMASA_4ISM_2TC_ISM4.csv ltv48_OMASA_4ISM_2TC.met -max_band fb scripts/switchPaths/sw_13k2_512k.bin 48 ltv48_OMASA_4ISM_2TC_48_OMASA_ISM4_2TC.pcm bit
eid-xor -vbr -fer bit ep_10pct_fer.g192 bit_err
IVAS_dec BINAURAL 48 bit_err out.wav
```
issue