The 2nd argument passed to the function is_primaryseg_expected
is used to index the array spectral->rparams.fragmentation_160 which
is of size 2.If the value of the argument is greater than or equal
to 2, the indexing will lead to array-out-of-bounds access.
The fix is adding the relevant validation check.
Change-Id: Iccf98b06c0546ad11ec67e93e14183214100107f