Fix another assert related to using decls.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@74262 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/SemaCXX/using-decl-1.cpp b/test/SemaCXX/using-decl-1.cpp
new file mode 100644
index 0000000..2459f25
--- /dev/null
+++ b/test/SemaCXX/using-decl-1.cpp
@@ -0,0 +1,8 @@
+// RUN: clang-cc -fsyntax-only -verify %s
+
+extern "C" { void f(bool); }
+
+namespace std {
+  using ::f;
+  inline void f() { return f(true); }
+}