Initialize scale variable in qmfForwardModulationLP_even() and qmfInverseModulationLP_even() which is updated in dct/fft processing.

Bug: 131430997
Test: atest DecoderTestXheAac ; atest DecoderTestAacDrc
Change-Id: Id294afb1ac740abf6000d7286e0f95c8b13a7eb8
1 file changed