Redundant warning with -Weffc++

[David Sveningsson <ext at sidvind dot com>]

Hi, when I compile the code below with -Weffc++ I get warnings about the 
initialization list.

class Foo {
public:
        Foo(): x(0), y(0){
        }

private:
        union {
                struct {
                        float x;
                        float y;
                };
                float v[2];
        };
};

initialization.cpp: In constructor ‘Foo::Foo()’:
initialization.cpp:3: warning: ‘Foo::<anonymous>’ should be initialized 
in the member initialization list
initialization.cpp:3: warning: ‘Foo::<anonymous union>::<anonymous>’ 
should be initialized in the member initialization list

I don't think this warning is correct as all memory has been initalized 
correctly. Is there a way to work around this or to disable only this 
warning?