Check element maps too to decide if geometry needs an update in DiscretizationVisualizationWriterMesh

[vovannikov]

Description and Context

It turned out, that checking only the node maps when deciding whether the update of the internal data structures inside DiscretizationVisualizationWriterMesh is not sufficient. Some output implementations may produce only cell output and it may happen that the corresponding nodes remain intact whereas the elements get updated: in this situation an error is later triggered here:

4C/src/core/io/src/4C_io_visualization_data.cpp

Lines 114 to 117 in 9e57490

	if (size % n_dim != 0)
	FOUR_C_THROW("The size of the data vector {} ({}) is not a multiple of the dimension ({})!",
	data_name, size, n_dim);
	if (size / n_dim != n_items)

This error was encountered by @mairehenke when working with a Taylor-Couette flow SPH benchmark of @slfuchs, I also then managed to reproduce it on a larger SPH benchmark.

[slfuchs]

I think someone else should review this PR. I have no real experience with this part of the code.

[mairehenke]

Thanks for fixing this! Sounds reasonable to me, but I’m also not an expert in this part of the code.