USAN in ivas_sba_dec_render_fx
# Basic info
Follow-up of #1528
<!--- Add commit SHA used to reproduce-->
- Float reference:
- Encoder (float): 2e062fa279923ebc9b39600e34d44c36cc145de2 (Tue May 13 11:29:38)
- Decoder (float): 2e062fa279923ebc9b39600e34d44c36cc145de2 (Tue May 13 11:29:38)
- Fixed point:
- Decoder (fixed): 3116b82817ea5888f96ead516ecac0fad6a3ce60 (Wed May 21 07:47:14)
# Bug description
A USAN error is detected in the BASOP decoder with this stv test case:
```bash
pytest "tests/codec_be_on_mr_nonselection/test_param_file.py::test_param_file_tests[stv-OSBA 2OA 2ISM bitrate switching, 32kHz in, 48kHz out, BINAURAL_ROOM_REVERB out, JBM Prof 5]" --update_ref 1 -n 1
pytest "tests/codec_be_on_mr_nonselection/test_param_file.py::test_param_file_tests[stv-OSBA 2OA 2ISM bitrate switching, 32kHz in, 48kHz out, BINAURAL_ROOM_REVERB out, JBM Prof 5]" -n 1 --dut_encoder_path IVAS_cod_ref
```
To build BASOP execs for USAN test:
```shell
export UBSAN_OPTIONS="suppressions=scripts/ubsan_basop.supp,report_error_type=1,print_stacktrace=1"
python3 scripts/basop_create_ignorelist_for_ubsan.py
make clean
make -j CLANG=3 IGNORELIST=1
```
The USAN error stacktrace can also be obtained directly with the supplied bitstreams:
[bs.dectrace](/uploads/4ca9137138e951515ff1009f0a348c32/bs.dectrace)
[bs.netsimout](/uploads/eefd94f835233d4698ea8f12b188031e/bs.netsimout)
```
IVAS_dec -Tracefile bs.dectrace -VOIP BINAURAL_ROOM_REVERB 48 bs.netsimout out.wav
<snip>
lib_dec/ivas_sba_dec_fx.c:917:59: runtime error: applying non-zero offset 960 to null pointer
#0 0x85cd93 in ivas_sba_dec_render_fx /mnt/c/Users/eerikno/OneDrive - Ericsson/code/ivas-basop/ivas-basop/lib_dec/ivas_sba_dec_fx.c:917:59
#1 0x76a73f in ivas_osba_dirac_td_binaural_jbm_fx /mnt/c/Users/eerikno/OneDrive - Ericsson/code/ivas-basop/ivas-basop/lib_dec/ivas_osba_dec_fx.c:154:5
#2 0x5ef6df in ivas_jbm_dec_flush_renderer_fx /mnt/c/Users/eerikno/OneDrive - Ericsson/code/ivas-basop/ivas-basop/lib_dec/ivas_jbm_dec_fx.c:2809:13
#3 0x84a0ca in ivas_sba_dec_reconfigure_fx /mnt/c/Users/eerikno/OneDrive - Ericsson/code/ivas-basop/ivas-basop/lib_dec/ivas_sba_dec_fx.c:243:35
#4 0x4e34f2 in ivas_dec_setup /mnt/c/Users/eerikno/OneDrive - Ericsson/code/ivas-basop/ivas-basop/lib_dec/ivas_init_dec.c:280:17
#5 0x4441a7 in IVAS_DEC_Setup /mnt/c/Users/eerikno/OneDrive - Ericsson/code/ivas-basop/ivas-basop/lib_dec/lib_dec_fx.c:1258:13
#6 0x44377c in IVAS_DEC_GetSamples /mnt/c/Users/eerikno/OneDrive - Ericsson/code/ivas-basop/ivas-basop/lib_dec/lib_dec_fx.c:1049:13
#7 0x447946 in IVAS_DEC_VoIP_GetSamples /mnt/c/Users/eerikno/OneDrive - Ericsson/code/ivas-basop/ivas-basop/lib_dec/lib_dec_fx.c:2861:13
#8 0x436f9c in decodeVoIP /mnt/c/Users/eerikno/OneDrive - Ericsson/code/ivas-basop/ivas-basop/apps/decoder.c:2343:24
#9 0x42bc2f in main /mnt/c/Users/eerikno/OneDrive - Ericsson/code/ivas-basop/ivas-basop/apps/decoder.c:573:17
#10 0x7fe33a565d8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#11 0x7fe33a565e3f in __libc_start_main csu/../csu/libc-start.c:392:3
#12 0x4045e4 in _start (/mnt/c/Users/eerikno/OneDrive - Ericsson/code/ivas-basop/ivas-basop/IVAS_dec+0x4045e4)
SUMMARY: UndefinedBehaviorSanitizer: nullptr-with-nonzero-offset lib_dec/ivas_sba_dec_fx.c:917:59 in
1011
<snip>
```
# Ways to reproduce
Either run the pytest above, or just build the BASOP decoder with USAN options enabled and run
<!--Commandline or script-->
```bash
IVAS_dec -Tracefile bs.dectrace -VOIP BINAURAL_ROOM_REVERB 48 bs.netsimout out.wav
```
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issue