support decade/UNKNOWN

diff --git a/lib/ID3FS/DB.pm b/lib/ID3FS/DB.pm
index 385cacd..a3a771f 100644 (file)
--- a/lib/ID3FS/DB.pm
+++ b/lib/ID3FS/DB.pm
@@ -270,6 +270,10 @@ sub add
     {
        $self->add_tag($file_id, "decade", "${1}0s");
     }
+    else
+    {
+       $self->add_tag($file_id, "decade", "UNKNOWN");
+    }
 
     if($self->ok($v1genre))
     {