Fix Error in LinearMaterial

Check if functional calls are right!

assigned to @gt2651

By laura.stengel on 2022-08-04T15:22:29 (imported from GitLab)

created branch 165-fix-error-in-linearmaterial to address this issue

By laura.stengel on 2022-08-04T15:24:54 (imported from GitLab)

mentioned in merge request !180 (merged)

By laura.stengel on 2022-08-08T15:53:12 (imported from GitLab)

mentioned in commit b1e6d563

By laura.stengel on 2022-08-08T15:53:56 (imported from GitLab)

closed