article download fixes

modules/backend-rpc.php

@@ -568,6 +568,10 @@
 	
 					while ($line = db_fetch_assoc($result)) {
 						print "<article><![CDATA[";
+
+						$line["marked"] = (int)sql_bool_to_bool($line["marked"]);
+						$line["unread"] = (int)sql_bool_to_bool($line["unread"]);
+
 						print json_encode($line);
 						print "]]></article>";
 					}

modules/popup-dialog.php

@@ -474,7 +474,8 @@
 			$amount = array(
 				50  => 50,
 				100 => 100,
-				250 => 250);
+				250 => 250,
+				500 => 500);
 
 			print_select_hash("amount", 50, $amount);