Fix unhandled enumerations in switch statement reading sparse matrices
Fix unhandled enumerations in switch statement reading sparse matrices

* src/mat5.c (Read5): Add default case for sparse data types

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