matlab: another fix to the savemat call

4 jobs for master in 3 minutes and 3 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Dist
passed gwinc/base #1142917

00:01:20

 
  Test
passed generate_budgets #1142918

00:01:19

 
  Deploy
passed pages #1142919

00:00:23

passed pages:deploy

00:00:00