From: Jaime Marquínez Ferrándiz <jaime.marquinez.ferrandiz@gmail.com>
Date: Sat, 20 Jul 2013 10:59:47 +0000 (+0200)
Subject: Don't try to write the subtitles if it's None
X-Git-Url: http://git.cielonegro.org/gitweb.cgi?a=commitdiff_plain;h=6804038d065e0eeffd9fca2dc55b3262a9191c10;hp=6804038d065e0eeffd9fca2dc55b3262a9191c10;p=youtube-dl.git

Don't try to write the subtitles if it's None
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