Restarting from mesh file LADDIE sometimes crashes

[FrankaJes]

I encountered issues with restarting from a mesh in LADDIE, getting the following warning:

'invalid mesh in file '

Commenting the following Safety check in netdcdf_setup_grid_mesh_from_file.f90 resolved it for me. However, bypassing the safety check is probably not the preferred way to solve this issue...

! Safety - check if the mesh data read from NetCDF makes sense
if (par%primary) then
if (.not. test_mesh_is_self_consistent( mesh)) call crash('invalid mesh in file ' // trim( filename))
end if

It does not happen for all mesh files, which is the strange thing. So I'm not completely sure why it happens.

More info in this commit:
#42f91487cb33ee35f52f1ab70431c3f3d4703698