JBM: SPAR low rate smoothing factor calculation may use undefined values

Basic info

• Commit SHA: 5924d993
• Platform: all

Bug description

The function ivas_spar_calc_smooth_facs() uses the constant MAX_PARAM_SPATIAL_SUBFRAMES to loop over the CLDFB time slots in a subframe. In the JBM case a subframe can have less CLDFB time slots than MAX_PARAM_SPATIAL_SUBFRAMES, so it will access undefined values in this case.

Ways to reproduce

On Linux:

./IVAS_cod -sba 3 13200 48 scripts/testv/stv3OA48c.wav test.192
scripts/tools/Linux/networkSimulator_g192 scripts/dly_error_profiles/dly_error_profile_10.dat test.192 test_rtp.192 trace_out 1 0
 /usr/bin/valgrind ./IVAS_dec -voip HOA3 48 test_rtp.192 test_rtp.dec.HOA3.wav