MASA_EXT_REND_DATA structure contains possibly extra reverb handle

In ivas_stat_rend.h, the struct MASA_EXT_REND_DATA contains directly a reverb handle but there is also a reverb handle within DIRAC_DEC_BIN_DATA. Both seem to be initialized so this is probably a mistake from some earlier step. It can cause problems by using the wrong handle and in minimum, it used resources. This needs to be checked and the unused one removed.