COMP: Fix TubeNJetLDAGenerator Clang glibc error/segfault.

Change-Id: I870412b980a37a6fe8cb8fc027d0b65635338f78
Merge topic 'NJetLDAGeneratorClang'

d78b985 COMP: Fix TubeNJetLDAGenerator Clang glibc error/segfault.