msm: vidc_3x: Fix for KW warnings.

temp_ctrl may explicitly dereference NULL value
returned by get_ctrl_from_cluster.
So added NULL check to avoid runtime errors.

Array elements not initialized, which can cause
security implications.
So initialized array elements.

Change-Id: I93457db1707fffe1e47b27890e83e5b8cd513aef
Signed-off-by: Mansur Alisha Shaik <mansur@codeaurora.org>