Btrfs: get/set for struct header fields

Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/Makefile b/fs/btrfs/Makefile
index ae7f4c0..f853220 100644
--- a/fs/btrfs/Makefile
+++ b/fs/btrfs/Makefile
@@ -25,7 +25,7 @@
 quick-test: $(objects) quick-test.o
 	gcc $(CFLAGS) -o quick-test $(objects) quick-test.o
 
-$(objects) : $(headers)
+$(objects): $(headers)
 
 clean :
 	rm debug-tree tester *.o