Somewhat subtle process_delivery() bug - $public was not being reset if a sys

channel is reached but then the loop iterated over another channel.

include/zot.php

@@ -1419,6 +1419,7 @@ function process_delivery($sender,$arr,$deliveries,$relay,$public = false,$reque
 	}
 	
 	foreach($deliveries as $d) {
+		$public = false;
 		$r = q("select * from channel where channel_hash = '%s' limit 1",
 			dbesc($d['hash'])
 		);