Checkin testcase for PR261

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12249 91177308-0d34-0410-b5e6-96231b3b80d8

test/C++Frontend/2004-03-08-ReinterpretCastCopy.cpp

@@ -0,0 +1,19 @@
+struct A {
+  virtual void Method() = 0;
+};
+
+struct B : public A {
+  virtual void Method() { }
+};
+
+typedef void (A::*fn_type_a)(void);
+typedef void (B::*fn_type_b)(void);
+
+int main(int argc, char **argv)
+{
+  fn_type_a f = reinterpret_cast<fn_type_a>(&B::Method);
+  fn_type_b g = reinterpret_cast<fn_type_b>(f);
+  B b;
+  (b.*g)();
+  return 0;
+}