bugfix MultiLevelHC #16

Job	Run time
Build (RelWithDebInfo)	6m 58s
Build (RelWithDebInfo-noEigen)	5m 24s
Build (Release)	2m 10s
Build (Debug)	4m 3s
Build & Test (RelWithDebInfo + Eigen)	6m 44s
Build & Test (RelWithDebInfo, no Eigen)	5m 55s
Build Docs	1m 39s
	32m 53s

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