Assert in reduce_metadata_further_fx for MASA selection test input
# Basic info
- Fixed point:
- Encoder (fixed): 909f10c34
# Bug description
Using a MASA format file generated from selection test material causes the BASOP encoder to assert in frame 153. The assert is
```
Assertion failed: (0), function L_shl, file basop32.c, line 2580
```
and the stack trace is here
# Ways to reproduce
The input files are in
Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-1169
and the command line for replication is
```bash
IVAS_cod -masa 2 BASOP_Selection_MUSHRA-7ad_s14.met -max_band fb 32000 48 BASOP_Selection_MUSHRA-7ad_s14.wav test_1484.bs
```
issue