Created attachment 250818 [details] [review]
Fix connect/disconnect-of dynamic signals

The following snippet generates false c-code while the dynamic-connect-wrapper doesnt have a return value.

class Foo : Object
{
}

void callback () {
}

void main ()
{
	dynamic Foo foo = new Foo ();
	var id = foo.hidden.connect (callback);
	foo.disconnect (id);
}