Make -Wformat check the argument type for %n.

This makes Clang check that the corresponding argument for "%n" in a
format string is a pointer to int.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160966 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed