add src/metaflac/Makefile to AC_OUTPUT
diff --git a/configure.in b/configure.in
index f0e80da..0b61cb4 100644
--- a/configure.in
+++ b/configure.in
@@ -33,6 +33,7 @@
 		src/Makefile	\
 		src/libFLAC/Makefile	\
 		src/flac/Makefile	\
+		src/metaflac/Makefile	\
 		src/plugin_xmms/Makefile	\
 		src/test_streams/Makefile	\
 		src/test_unit/Makefile	\