Fix bug in copying subset nodes.
Fix bug in copying subset nodes.

teharrison/Shock,wgerlach/Shock,teharrison/Shock,wgerlach/Shock,teharrison/Shock,MG-RAST/Shock,wgerlach/Shock,teharrison/Shock,MG-RAST/Shock,MG-RAST/Shock,wgerlach/Shock,MG-RAST/Shock,wgerlach/Shock,teharrison/Shock,teharrison/Shock,MG-RAST/Shock