Decoder crash for Stereo at 16.4kbps in cng_params_upd_ivas_fx()
# Basic info
<!--- Add commit SHA used to reproduce -->
- Float reference:
- Encoder (float): f2eb9e0831ece72ec66a0c07e62d1f3302e2a910
- Decoder (float):
- Fixed point:
- Encoder (fixed):
- Decoder (fixed): 28058dcee46d9e1eed0c3459b8e0a61254c1ffee
# Bug description
The fixed point decoder crashes with an assert:
```
Assertion failed: (0), function L_shl, file basop32.c, line 2326.
```
{width=393 height=270}
# Ways to reproduce
Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1384
<!-- Commandline or script -->
```bash
./IVAS_cod_flt_ref -stereo -max_band FB 16400 48 am1aa1s14_48.10dB.wav bit
./IVAS_dec_fx mono 16 bit out.wav
# crash also occurs for 32 and 48 kHz output sampling rate and stereo output format
```
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issue