update copyright to 2004
diff --git a/configure.in b/configure.in
index 99bb903..5fb4e3c 100644
--- a/configure.in
+++ b/configure.in
@@ -1,5 +1,5 @@
 #  FLAC - Free Lossless Audio Codec
-#  Copyright (C) 2001,2002,2003  Josh Coalson
+#  Copyright (C) 2001,2002,2003,2004  Josh Coalson
 #
 #  This file is part the FLAC project.  FLAC is comprised of several
 #  components distributed under difference licenses.  The codec libraries