Write numeric class type for sparse arrays in HDF5 files
Write numeric class type for sparse arrays in HDF5 files

* src/mat73.c (Mat_TypeToClass73): Added

* src/mat73.c (Mat_VarWriteSparse73): Calculate class type from the data
      type, and write in the MATLAB_class attribute

MaartenBent/matio,telehan/libmatio,tbeu/matio,NJannasch/matio,MaartenBent/matio,CBL-ORION/matio-sf-mirror,CBL-ORION/matio,telehan/libmatio,CBL-ORION/matio-sf-mirror,CBL-ORION/matio,tbeu/matio,MaartenBent/matio,martinichka/matio-coder,tbeu/matio,tbeu/matio,MaartenBent/matio,martinichka/matio-coder,NJannasch/matio,martinichka/matio-coder