Some methods returning base structs (Vector, Quaternion, etc) cause AccessViolationException

[EgorBo]

Let's take a look at Node type.
When CxxBinders sees

const Vector3& GetPosition() const { return position_; }

it generates:

DllExport Interop::Vector3 
Node_GetPosition (Urho3D::Node *_target)
{
    return *((Interop::Vector3  *) &(_target->GetPosition ()));
}

(converts Urho3D::Vector3 to Interop::Vector3 and everything is OK).

BUT when it sees:

Vector2 GetPosition2D() const { return Vector2(position_.x_, position_.y_); }

(returns a new instance on each call)
it generates:

DllExport Urho3D::Vector2
Node_GetPosition2D (Urho3D::Node *_target)
{
    return _target->GetPosition2D ();
}

and it won't work (managed code will get a corrupted piece of memory)
it can be fixed if the CxxBinder generates it something like this:

DllExport Interop::Vector2
Node_GetPosition2D (Urho3D::Node *_target)
{
    return *((Interop::Vector2 *) &(_target->GetPosition2D ()));
}

I guess it should be fixed here: (for all basic types: Vector2, Vector3, etc) https://github.com/xamarin/urho/blob/master/SharpieBinder/CxxBinder.cs#L1071

[EgorBo]

closing with #54 with fix 85b3fc0 fix is verified.