event_match: always match on None value
Before, event_match didn't always recurse if the event value was not a
dictionary, and would instead check for equality immediately.
By delaying equality checking to post-recursion, we can allow leaf
values like "5" to match "None" and take advantage of the generic
This makes the matching a little more obviously consistent at the
expense of being able to check for explicit None values, which is
probably not that important given what this function is used for.
Signed-off-by: John Snow <email@example.com>
Signed-off-by: Max Reitz <firstname.lastname@example.org>