From: Antonio Ospite <ao2@ao2.it>
Date: Wed, 6 Jun 2018 13:36:39 +0000 (+0200)
Subject: src/rss_converter_twitter.com.xsl: only output channel image when it's available
X-Git-Tag: v1.3.0~1
X-Git-Url: https://git.ao2.it/tweeper.git/commitdiff_plain/afe68068d46a90602d6f4fd9f13e196578884512?hp=afe68068d46a90602d6f4fd9f13e196578884512

src/rss_converter_twitter.com.xsl: only output channel image when it's available

Hashtag pages do not have an image usable as a channel logo, and in
cases like this the <url/> element would be empty, but this would make
the feed invalid according to https://www.feedvalidator.org

So, to produce feeds which validate, avoid outputting the whole <image/>
element when there is no suitable image to use as a channel logo.
---