Added TODO.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@47843 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Sema/SemaChecking.cpp b/Sema/SemaChecking.cpp
index fe82ea6..6d3eea5 100644
--- a/Sema/SemaChecking.cpp
+++ b/Sema/SemaChecking.cpp
@@ -244,6 +244,9 @@
 ///
 ///  (8) Check that the format string is a wide literal.
 ///
+///  (9) Also check the arguments of functions with the __format__ attribute.
+///      (TODO).
+///
 /// All of these checks can be done by parsing the format string.
 ///
 /// For now, we ONLY do (1), (3), (5), (6), (7), and (8).