cpp: Add error handling for invalid frame length in cpp frame info

There will be overflow if message length in cpp frame info is big value.
Add error check to prevent integer overflow.

Change-Id: I869adf87dfbd18f4182571e1b4eb17e7a130e15c
Signed-off-by: Krishnankutty Kolathappilly <kkolat@codeaurora.org>