object hierarchy changes hollow set flag

[0mniverse]

Concerns version 3.7.0.0 onward, although was opposite way around in previous version(s).

Unexpected results can occur if object keyword hollow is used in CSG and/or looks_like object because of internal hierarchy that sets the hollow on/off flag according to last encounter (or off if hollow not specified), thereby resetting all others to that particular final one.

Note this was not found by me, and was discussed with test scene at: http://news.povray.org/povray.binaries.scene-files/thread/%3C596094bf%241%40news.povray.org%3E/

Bob