[EXTERNAL] [PATCH] app/compress-perf: fix coverity issue

[Akhil Goyal]

> Removes possible assignment of a signed value
> to an unsigned parameter. Also makes dictionary
> an optional argument
> 
> Coverity issue: 490944
> Fixes 568815516e88 (app/compress-perf: support dictionaries and PDCP
> checksum)
> 
> Signed-off-by: Sameer Vaze <svaze at qti.qualcomm.com>


DO NOT send same patches multiple times with same version.

Fixed fixes tag
Applied to dpdk-next-crypto