Clean up warning and add a test.

llvm-svn: 184466
diff --git a/clang/test/SemaCXX/conversion-function.cpp b/clang/test/SemaCXX/conversion-function.cpp
index 6fca050..0e7c391 100644
--- a/clang/test/SemaCXX/conversion-function.cpp
+++ b/clang/test/SemaCXX/conversion-function.cpp
@@ -11,6 +11,8 @@
   float g() {
     return operator float(); // expected-error{{use of undeclared 'operator float'}}
   }
+
+  static operator short(); // expected-error{{conversion function must be a non-static member function}}
 };
 
 operator int(); // expected-error{{conversion function must be a non-static member function}}