OMASA crash in inactive static separated object

When the separated channel is inactive and the MASA metadata needs very few bits (Static front object) such that the CPE remaining bitrates was above MAX_GSC_INACTIVE_BRATE limit in inactive mode.

Files:

Command line:

IVAS_cod.exe -ism_masa 3 1 ltv_oMASA_3ISM_varDir1TC_ISM1.csv ltv_oMASA_3ISM_varDir1TC_ISM2.csv ltv_oMASA_3ISM_varDir1TC_ISM3.csv ltv_oMASA_3ISM_varDir1TC.met 32000 48 ltv_oMASA_3ISM_varDir1TC.wav tst.enc