msm: vidc: Fix memory leak and array abounds exceeding issues

Fix memory leak in error case and check for array bounds
exceeding issues to avoid video failures.

CRs-Fixed: 2004899
Change-Id: I723dc07f6e58651a3f669095dc23984741b6c295
Signed-off-by: Maheshwar Ajja <majja@codeaurora.org>