Decoder crash for MC 7.1+4 at 384kbps in IGF_replaceTCXNoise_1()

The fixed point decoder crashes with an assert in basop32.c:1786:

Assertion failed: (0), function L_add, file basop32.c, line 1786.
Frames processed:       169     

Steps to reproduce:

./IVAS_cod_flt_ref -mc 7_1_4 -max_band FB 384000 48 experiments/basop-verification/MC-7_1_4/proc_input/am3ba1s05.wav out/mc-7_1_4--am3ba1s05--384000.192
./IVAS_dec_fx 7_1_4 48 out/mc-7_1_4--am3ba1s05--384000.192 out/mc-7_1_4--am3ba1s05--384000.clean.dec.fx.wav

This crash also occurs with FEC and also for another verification test item:

• mc-7_1_4--am3ba1s05--384000.fer.192
• mc-7_1_4--bm3aa1s05--384000.192
• mc-7_1_4--bm3aa1s05--384000.fer.192

Error patterns:

• mc-7_1_4--am3ba1s05--384000_ep.192
• mc-7_1_4--bm3aa1s05--384000_ep.192

Float reference SHA (_flt_ref): d9fdb374

FX binary SHA (_fx): 4e097f2f

Bitstream can be shared upon request.