Fix the deletion of sub grids.

When deleting, it was possible to screw up the right most grid list.  Fix.


git-svn-id: https://groke.mcmaster.ca/svn/grad/colin/branches/TableTool_refactor@8742 57e6efec-57d4-0310-aeb1-a6c144bb1a8b

@HierarchicalGrid/delete_cell.m

@@ -28,7 +28,7 @@ function delete_cell( object, beneath_cell, the_cell )
         rmgc = object.right_most_grid_cells;
         object.right_most_grid_cells = [rmgc(1:top_rmgi-1) rmgc(bottom_rmgi+1:size(rmgc, 2))];
         
-        if ~isempty(beneath_cell)
+        if ~isempty(beneath_cell) && size(beneath_cell.grid, 2) == 0
             rmgc = object.right_most_grid_cells
             object.right_most_grid_cells = [rmgc(1:top_rmgi-1) {beneath_cell} rmgc(top_rmgi:size(rmgc, 2))];
             top_rmgi = top_rmgi + 1;