permissions php error applying bit compare operation on a (presumed) boolean

include/permissions.php

@@ -47,6 +47,9 @@ function get_all_perms($uid, $observer_xchan, $internal_use = true) {
 		// First find out what the channel owner declared permissions to be.
 
 		$channel_perm = \Zotlabs\Access\PermissionLimits::Get($uid,$perm_name);
+		if($channel_perm === false) {
+			$channel_perm = 0;
+		}
 
 		if(! $channel_checked) {
 			$r = q("select * from channel where channel_id = %d limit 1",