Merge pull request #610 from RosettaCommons/vmullig/fix_energy_per_residue_filter
Small fix to EnergyPerResidueFilter.cc.
The filter previously assumed that all poses have PDB info, which is not necessarily true for poses that Rosetta generates itself. This adds a check for a PDBinfo object before trying to access that object.
This is a very minor bugfix, so I'm merging without putting it through the test server to save test server clock cycles.