message: fix double bonds from sctruct_conn records
diff: @@ -133,7 +133,7 @@ function findBonds(unit: Unit.Atomic, props: BondComputationProps): IntraUnitBon
  const p = partnerA.atomIndex === aI ? partnerB : partnerA;
  const _bI = SortedArray.indexOf(unit.elements, p.atomIndex) as StructureElement.UnitIndex;
  - if (_bI < 0) continue;
  + if (_bI < 0 || atoms[_bI] < aI) continue;
  atomA[atomA.length] = _aI;
  atomB[atomB.length] = _bI;
  