Adding/Removing lights can cause meshes to fail frustum tests

[csvurt]

When a <light> is added to and then removed from a <group> that also contains a <mesh> element that mesh will fail subsequent frustum tests and get culled (ie. not rendered). This also happens if the object is referenced through a <model> element and applies to all children of the affected group node too.

The bug doesn't occur if the light is added and removed inside its own element, it seems to only affect meshes and meshes of child groups inside the same group as the light.

Below is a test scene, instructions for reproducing the bug are included.
https://www.dropbox.com/s/xdsl2lzr90nekyt/lightbug.zip?dl=0

[ksons]

Should be fixed with c733576. Issue will close automatically as soon as this is on master.