Leon Stringer 02cc1ecd77 MDL-62316 OAuth 2: Only guess image if base URL set.
If you added an OAuth 2 service with no base URL guess_image() would try to
parse this empty value looking for a favicon.ico.  We now check if the base
URL is empty beforehand and skip this if so.
2018-05-22 17:43:05 +01:00
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