Merge pull request #5783 from RosettaCommons/roccomoretti/interactive_fix_hbond_crash
[Foldit] Fix issue with crashes in hbond scoring.
One of the more regular crashes we're getting now in ligand design puzzles is a crash in ligand scoring, related to vector normalization.
Tracing through where it's used downstream, I think we should be okay with returning a zero vector in these rare cases.
RELEASE NOTES: Fix some crashes in scoring related to hydrogen bonds