add copyright statement and GPL2+ license statement

[migration-tools.git] / Equinox-Migration / lib / Equinox / Migration / SimpleTagList.pm

diff --git a/Equinox-Migration/lib/Equinox/Migration/SimpleTagList.pm b/Equinox-Migration/lib/Equinox/Migration/SimpleTagList.pm
index ffe3591..1b455d1 100644 (file)
--- a/Equinox-Migration/lib/Equinox/Migration/SimpleTagList.pm
+++ b/Equinox-Migration/lib/Equinox/Migration/SimpleTagList.pm
@@ -1,5 +1,21 @@
 package Equinox::Migration::SimpleTagList;
 
+# Copyright 2009-2012, Equinox Software, Inc.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
 use warnings;
 use strict;
 
@@ -86,7 +102,7 @@ or Perl will think you're passing a (possibly malformed) octal value.
 
 =cut
 
-sub has { my ($self, $t) = @_; $t =~ s/^0+//; return (defined $self->{tags}{$t}) ? 1 : 0 }
+sub has { my ($self, $t) = @_; return 0 unless $t; $t =~ s/^0+//; return (defined $self->{tags}{$t}) ? 1 : 0 }
 
 =head2 as_hashref