From: ArthurHoaro <arthur@hoa.ro>
Date: Fri, 10 Aug 2018 15:09:51 +0000 (+0200)
Subject: Fix issue 'You are not authorized to add a link' with thumbnails enabled
X-Git-Tag: v0.10.1~5^2
X-Git-Url: https://git.immae.eu/?a=commitdiff_plain;h=b5c368b85885b82e7db7e509c8a7e2035d51e0a1;hp=b5c368b85885b82e7db7e509c8a7e2035d51e0a1;p=github%2Fshaarli%2FShaarli.git

Fix issue 'You are not authorized to add a link' with thumbnails enabled

Do not try to alter the datastore by updating thumbnails if the user isn't logged in.

Also, do not enable thumbnails if PHP GD extension is not installed/loaded
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