Decoder crash for ParamMC at 48kbps FER mono/stereo decoding at 32 and 48 kHz in ivas_ls_setup_conversion_process_mdct_param_mc_fx()
# Basic info
<!--- Add commit SHA used to reproduce -->
- Float reference:
- Encoder (float): ceb8871fb395dc677e0a02e8dba99d36074630c2
- Decoder (float):
- Fixed point:
- Encoder (fixed): d74de338b9d39268bf1db19b2c5792ca359ab02b
- Decoder (fixed):
# Bug description
The fixed point decoder crashes with an assert:
```
Assertion failed: (0), function L_add, file basop32.c, line 1661.
```
{width=402 height=263}
# Ways to reproduce
Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1436
<!-- Commandline or script -->
```bash
./IVAS_cod_flt_ref -mc 5_1 -max_band FB 48000 48 am2aa1s09_48.10dB.wav bit
eid-xor -vbr -fer bit 5_1.am2aa1s09_ep.192 bit_err
./IVAS_dec_fx stereo 48 bit_err out.wav
```
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issue