message: fix computeInterUnitBonds from IndexPairBonds
diff: @@ -32,7 +32,6 @@ function getDistance(unitA: Unit.Atomic, indexA: ElementIndex, unitB: Unit.Atomi
  const _imageTransform = Mat4.zero();
  function findPairBonds(unitA: Unit.Atomic, unitB: Unit.Atomic, props: BondComputationProps, builder: InterUnitGraph.Builder<Unit.Atomic, StructureElement.UnitIndex, InterUnitEdgeProps>) {
  -
  const { elements: atomsA, residueIndex: residueIndexA } = unitA;
  const { x: xA, y: yA, z: zA } = unitA.model.atomicConformation;
  const { elements: atomsB, residueIndex: residueIndexB } = unitB;
  @@ -72,7 +71,10 @@ function findPairBonds(unitA: Unit.Atomic, unitB: Unit.Atomic, props: BondComput
  if (!props.forceCompute && indexPairs) {
  const { order, symmetryA, symmetryB } = indexPairs.edgeProps;
  for (let i = indexPairs.offset[aI], il = indexPairs.offset[aI + 1]; i < il; ++i) {
  - const _bI = SortedArray.indexOf(unitA.elements, indexPairs.b[i]) as StructureElement.UnitIndex;
  + const bI = indexPairs.b[i];
  + if (aI >= bI) continue;
  +
  + const _bI = SortedArray.indexOf(unitA.elements, bI) as StructureElement.UnitIndex;
  if (_bI < 0) continue;
  if (symmetryA[i] === symmetryB[i]) continue;
  if (type_symbolA.value(aI) === 'H' && type_symbolB.value(indexPairs.b[i]) === 'H') continue;
  