[OGRE-63] Entity children whose shadow caster status does not match the parent entity are not handled correctly.

[paroj]

[reporter="spacegaier", created="Sun, 25 Nov 2012 00:45:24 +0100"]

Original reporter: fedyakin

1) Non-shadow casting children of a shadow casting entity will be queued for rendering during the shadow pass.
2) Shadow casting children of a non shadow casting entity will not cast shadows.

See forum thread http://www.ogre3d.org/forums/viewtopic.php?f=2&t=69233 for a detailed explanation.

The reason this happens is that Entity::_updateRenderQueue always adds all of its visible children to the render queue. However, when this is called from RenderQueue::processVisibleObject with onlyShadowCasters=true, the entity has no way of knowing it shouldn't add non-shadow casters children.