Forgot to export is_nick

modules/Pisg/Common.pm

@@ -8,7 +8,7 @@ Pisg::Common - some common functions of pisg.
 
 use Exporter;
 @ISA = ('Exporter');
-@EXPORT = qw(add_alias add_aliaswild add_ignore add_url_ignore is_ignored url_is_ignored find_alias store_aliases restore_aliases match_urls match_email htmlentities);
+@EXPORT = qw(add_alias add_aliaswild add_ignore add_url_ignore is_ignored url_is_ignored find_alias store_aliases restore_aliases match_urls match_email htmlentities is_nick);
 
 use strict;
 $^W = 1;