4b427e1b57 confused `unode->maxgrid` and `unode->grids.size()`
which is the number of all grids in the mesh. A follow-up commit will
rename `maxgrid` to make that clearer.
4b427e1b57 confused `unode->maxgrid` and `unode->grids.size()`
which is the number of all grids in the mesh. A follow-up commit will
rename `maxgrid` to make that clearer.