Fix memory leak in v4 MAT variable info read if an error is encountered
Fix memory leak in v4 MAT variable info read if an error is encountered

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