Grab favicon from site's URL, not the feed's

• Changed Feed to where the favicon is gotten when parsing so the
feed’s site URL is used instead of the feed’s for favicons. Some feeds
don’t have the same domain.
• Fixed a bug in Database.

lib/Database.php

@@ -499,7 +499,7 @@ class Database {
             try {
                 $feed = new Feed($f['url'], $f['lastmodified'], $f['etag'], $f['username'], $f['password']);
             } catch (Feed\Exception $e) {
-                $this->db->prepare('UPDATE arsse_feeds SET err_count = err_count + 1, err_msg = "" WHERE id is ?', 'str', 'int')->run(
+                $this->db->prepare('UPDATE arsse_feeds SET err_count = err_count + 1, err_msg = ? WHERE id is ?', 'str', 'int')->run(
                     $e->getMessage(),
                     $f['id']
                 );

lib/Feed.php

@@ -21,8 +21,6 @@ class Feed {
 
             $this->reader = new Reader($config);
             $this->resource = $this->reader->download($url, $lastModified, $etag, $username, $password);
-            // Grab the favicon for the feed; returns an empty string if it cannot find one.
-            $this->favicon = (new Favicon)->find($url);
         } catch (PicoFeedException $e) {
             throw new Feed\Exception($url, $e);
         }
@@ -36,6 +34,11 @@ class Feed {
                 $this->resource->getEncoding()
             );
             $feed = $this->parser->execute();
+
+            // Grab the favicon for the feed; returns an empty string if it cannot find one.
+            // Some feeds might use a different domain (eg: feedburner), so the site url is
+            // used instead of the feed's url.
+            $this->favicon = (new Favicon)->find($siteUrl);
         } catch (PicoFeedException $e) {
             throw new Feed\Exception($url, $e);
         }