[osg-submissions] Change to StateSet::merge() treatment of RenderBin state

[Paul Martz]

Hi Robert -- 
 
The attached code changes StateSet::merge() so that it copies RenderBin data
such as the rendering hint and RenderBin details from rhs into "this", only
if "this" has RenderBin mode set to INHERIT.
 
It replaces a comment by you indicating something along these lines should
be done. To me, this seems like the right thing to do.
 
Thanks,
 
Paul Martz
Skew Matrix Software LLC
http://www.skew-matrix.com <http://www.skew-matrix.com/> 
+1 303 859 9466
 
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