[JFFS2] Fix dummy jffs2_sum_scan_sumnode() macro for !SUMMARY case.

I added an argument to the real function...

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/fs/jffs2/summary.h b/fs/jffs2/summary.h
index e7eb0c5..6bf1f6a 100644
--- a/fs/jffs2/summary.h
+++ b/fs/jffs2/summary.h
@@ -202,7 +202,7 @@
 #define jffs2_sum_add_dirent_mem(a,b,c)
 #define jffs2_sum_add_xattr_mem(a,b,c)
 #define jffs2_sum_add_xref_mem(a,b,c)
-#define jffs2_sum_scan_sumnode(a,b,c,d) (0)
+#define jffs2_sum_scan_sumnode(a,b,c,d,e) (0)
 
 #endif /* CONFIG_JFFS2_SUMMARY */