VKalVrt: Build memory corruption/Segfault fix

On some systems during a build the tool is constructed and destructed without calling initialize(). This uninitialised ptr was causing segfaults.

Fix should also go into 21.0. Bug is not present in master.

added Derivation alsoTargeting:21.0 bugfix labels

This merge request affects 1 package:

• Tracking/TrkVertexFitter/TrkVKalVrtFitter

added 21.2 Tracking review-pending-level-1 labels

CI Result SUCCESS

	AnalysisBase	AnalysisTop	AthAnalysis	AthDerivation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-23901-2019-06-03-14-57
AthDerivation: number of compilation errors 0, warnings 1
For experts only: Jenkins output [CI-MERGE-REQUEST 39361]

Trivial change, approving obo L1 - nice detective work!

@krumnack, feel free to merge this one in if you agree!

Best, Christian

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit f36daa37

added sweep:done label

mentioned in commit f19e24ee

Sweep summary
successful:

• 21.0

(see https://aiatlas154.cern.ch/jenkins/job/auto_git_sweeps/804/console for details)

mentioned in merge request !23952 (merged)

mentioned in commit e48bd3f2

mentioned in merge request !24191 (merged)

mentioned in commit 71376efd