Does #765855 affect osgearth?

["Rebecca N. Palmer" <rebecca_palmer@zoho.com>]

#765855 is a use-after-free crash in Node::remove*Callback; it has now 
been fixed in openscenegraph, but as the affected method is inline, a 
rebuild is required to pick up the fix.

I have only seen this in simgear, but osgearth could be affected as well 
(I don't use it, so I don't know for sure).  Release team declined (in 
#768199) to do a just-in-case binNMU of all rdeps, so if you think 
you're affected, you need to ask for one.