--- trunk/lib/WebPAC/Normalize.pm	2007/04/11 10:09:34	819
+++ trunk/lib/WebPAC/Normalize.pm	2007/05/23 20:03:14	831
@@ -872,6 +872,9 @@
 
 	my ($h,$include_subfields) = @_;
 
+	# sanity and ease of use
+	return $h if (ref($h) ne 'HASH');
+
 	if ( defined($h->{subfields}) ) {
 		my $sfs = delete $h->{subfields} || die "no subfields?";
 		my @out;