waveMethod called from inverseDistanceCellCellStencil returns error for empty source processors

Summary

inverseDistanceCellCellStencil calls waveMethod::calculate(tgtMesh, srcMesh, tgtToSrcAddr) which then calls

        FaceCellWave<meshToMeshData, meshToMeshData::trackData> calc
        (
            src,
            changedFaces,
            changedFacesInfo,
            faceData,
            cellData,
            src.globalData().nTotalCells(),   // max iterations
            td
        );

which will return an error when src.globalData().nTotalCells() is 0. A solution is to add 1 (works for me) or maybe, more logical, make a max(1,src.globalData().nTotalCells())

What is the current bug behaviour?

returns error

Maximum number of iterations reached. Increase maxIter.

What is the expected correct behavior?

overset runs

Environment information

I think hierarchical is particularly sensible to this issue.

Possible fixes

mentioned above

PS: I'm not sure I can get this error for the "standard" code, as I haven't tested if empty src is possible. I'm using a modified B-box inverseDistance scheme...