front page log checker: filter out idiotic GD warning

classes/rpc.php

@@ -534,7 +534,12 @@ class RPC extends Handler_Protected {
 				$log_interval = "created_at > DATE_SUB(NOW(), INTERVAL 1 HOUR)";
 			}
 
-			$sth = $pdo->prepare("SELECT COUNT(id) AS cid FROM ttrss_error_log WHERE errno != 1024 AND $log_interval");
+			$sth = $pdo->prepare("SELECT COUNT(id) AS cid
+				FROM ttrss_error_log
+			WHERE
+				errno != 1024 AND
+				$log_interval AND
+				errstr NOT LIKE '%imagecreatefromstring(): Data is not in a recognized format%'");
 			$sth->execute();
 
 			if ($row = $sth->fetch()) {