From: Jason A. Donenfeld <Jason@zx2c4.com>
Date: Mon, 13 Jan 2014 02:56:50 +0000 (+0100)
Subject: filter: return on null filter from open and close
X-Git-Url: https://gitweb.ps.run/ps-cgit/commitdiff_plain/800380dde797ae35d738a644acdae2fabb9a0d44?hp=800380dde797ae35d738a644acdae2fabb9a0d44

filter: return on null filter from open and close

So that we don't have to include the if(filter) open_filter(filter)
block everywhere, we introduce the guard in the function itself. This
should simplify quite a bit of code.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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