Add attribute "format" support for typedefs of function pointers.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@50906 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index 748b66f..afe877f 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -2338,6 +2338,8 @@
     Ty = decl->getType();
   else if (FieldDecl *decl = dyn_cast<FieldDecl>(d))
     Ty = decl->getType();
+  else if (TypedefDecl* decl = dyn_cast<TypedefDecl>(d))
+    Ty = decl->getUnderlyingType();
   else
     return 0;