increase the S_p2a threshold to prevent ACELP->TCX mis-classifications on male voices

#define TOD_NSPEC                           80                      /* number of spectral bins of the tonal detector */

#define TOD_THR_MASS                        0.86f                   /* initial value for the adaptive threshold of the tonal detector */

#define P2A_FACT                            0.9f                    /* long-term averaging factor for peak-to-average ratio */

#ifdef FIX_SP2A

#define THR_P2A                             95.0f                   /* threshold to detect strongly peaky signals */

#else

#define THR_P2A                             80.0f                   /* threshold to detect strongly peaky signals */

#endif

/*----------------------------------------------------------------------------------*

 * LD music post-filter constants

#define FIX_ISM_DTX_CLICKS                              /* FhG: fix for clicks in ISM DTX for inactive to active TCX transitions */

#define ISSUE_24_CLEANUP_MCT_LFE                        /* Issue 24: Cleanup LFE path withing MCT */ 

#define FIX_401_DIRAC_RENDERER_META_READ_INDICES        /* Nokia: Issue 401: Fix metadata reading indices in DirAC renderer. */

#define FIX_SP2A                                        /* VA: Issue 412: Adjust threshold for the S_p2a feature in the tonal detector */

/* ################## End DEVELOPMENT switches ######################### */

/* clang-format on */