Fix #31780, cycles nested group rendering broken. Was using the dupli object 'index' member to identify dupli objects, but this is not unique and in fact just 0 in most cases. Needs to use a simple dupli list counter instead.
Fix #31780, cycles nested group rendering broken. Was using the dupli object 'index' member to identify dupli objects, but this is not unique and in fact just 0 in most cases. Needs to use a simple dupli list counter instead.

pyrochlore/cycles,tangent-opensource/coreBlackbird,tangent-opensource/coreBlackbird,pyrochlore/cycles,pyrochlore/cycles,tangent-opensource/coreBlackbird