USAN: NaN value in MC 5.1 decoding to STEREO at 13.2kbps WB

Basic info

• Commit SHA: 99397abc

Bug description

Clang USAN sanitizer test in pipeline found an error:

lib_com/tools.c:431:20: runtime error: -nan is outside the range of representable values of type 'short'
SUMMARY: UndefinedBehaviorSanitizer: float-cast-overflow lib_com/tools.c:431:20 in

Link to test pipeline: https://forge.3gpp.org/rep/ivas-codec-pc/ivas-codec/-/jobs/264608

Ways to reproduce

Using the scripts:

python3 scripts/IvasBuildAndRunChecks.py --checks CLANG3 -m MC_5_1_b13_2_wb_cbr -p /path/to/my/local/ci_linux_ltv_local.json --usan_supp_file scripts/ubsan.supp

or directly:

make clean
make -j CLANG=3
UBSAN_OPTIONS=suppressions=scripts/ubsan.supp,report_error_type=1,log_path=usan_log_catchall ./IVAS_cod -mc 5_1 -max_band wb 13200 16 ltv16_MC51.wav bit
UBSAN_OPTIONS=suppressions=scripts/ubsan.supp,report_error_type=1,log_path=usan_log_catchall ./IVAS_dec stereo 16 bit out.wav