v4l2dec: CF1 Check input_buffer when used [3/3]

PD#SWPL-183734

Problem:
Check whether the input_buffer exists when being used

Solution:
Check whether the input_buffer exists when being used

Verify:
Yocto

Signed-off-by: le.han <le.han@amlogic.com>
Change-Id: I7065231a31cd85bb5cc37d73470236d7a3723972
1 file changed