Uninitialized value is being used in float code in ivas_stereo_dft_enc_itd.c

In the function, stereo_dft_enc_itd_vad, the 0th element of Spd_L and Spd_R is not initialized. And garbage values seem to be getting used for intermediate calculations. When BASOPs are being used, encountering asserts.

Encoder command: IVAS_cod -ism_masa 3 2 stvISM1.csv stvISM2.csv stvISM3.csv stv2MASA2TC48c.met sw_13k2_512k_2fr_start_160k_omasatechs_3ism.bin 48 stvOMASA_3ISM_2MASA2TC48c.wav stvOMASA_3ISM_2MASA2TC48c.wav_OMASA_2Dir2TC_3ISM_at_br_sw_techs_13_2_to_512_kbps_start_160_kbps_48kHz_in_48kHz_out_MONO_out.192