ComponentMatchingFamily.componentAddedToEntity check added component

[Kalinovych]

Hi Richard,
I have noticed that the componentAddedToEntity() function has no check is added component required by this family's NodeList as it made in componentRemovedFromEntity.

public function componentAddedToEntity( entity : Entity, componentClass : Class ) : void
{
    addIfMatch( entity );
}

public function componentRemovedFromEntity( entity : Entity, componentClass : Class ) : void
{
    if( components[componentClass] )
    {
        removeIfMatch( entity );
    }
}

Maybe you skipped this check consciously because it can cause some issues?
Or function componentAddedToEntity can look like:

public function componentAddedToEntity( entity : Entity, componentClass : Class ) : void
{
    if( components[componentClass] )
    {
        addIfMatch( entity );
    }
}

[Kalinovych]

#27