Fixed out of bound reads in stack variables

Out of bound reads in the following variables are fixed

scaling_mat_offset in ihevcd_iquant_itrans_recon_ctb()
ai1_offset_y, ai1_offset_cb and ai1_offset_cr in ihevcd_sao_shift_ctb()

These values were read but not used

b/32915871

Change-Id: Ib07e2ed1bdcc600700d4e9e5d970f6cc2164ab1b
(cherry picked from commit 4def2dfabf8afcb185942131c1e67bb3ff211f05)
2 files changed