MSVC 64-bit: In queryInterface optimization, copy hidden ret val addr

...to location where privateSnippetExecutor will pick it up to return it from
RAX.

Change-Id: I59b8db1a12177a3c4da4c810770bee4ace295115

bridges/source/cpp_uno/msvc_win32_x86-64/cpp2uno.cxx

@@ -332,6 +332,7 @@ extern "C" typelib_TypeClass cpp_vtable_call(
                             pInterface->release();
                             TYPELIB_DANGER_RELEASE( pTD );
 
+                            pStack[0] = pStack[3];
                             eRet = typelib_TypeClass_ANY;
                             break;
                         }