Jason A. Donenfeld 800380dde7 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>

2014-01-14 02:00:07 +01:00

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