ACL library silently fail to classify packets if group is not 4b long in field definition

[Pawel Wodkowski]

Hi,

I'm using version 20.05.0 but I believe current version is also affected.

In I know that the ACL group must be constructed of 4 consecutive bytes.
But when the group is not 4B long (eg. no need to check more than 2B)
then the rte_acl_create() function return success but classification always
fail. Can some basic checking be added to validate the given ACL rules
definition to make the life easier?

Paweł