GSF : KL Gaussian Mixture reduction , use an array to keep track of the merged components.

GSF : KL Gaussian Mixture reduction , use an array to keep track of the merged components . Add/clarify a few more comments

This merge request affects 2 files:

• Tracking/TrkFitter/TrkGaussianSumFilter/TrkGaussianSumFilter/KLGaussianMixtureReduction.h
• Tracking/TrkFitter/TrkGaussianSumFilter/src/KLGaussianMixtureReduction.cxx

Adding @amorley as watcher

added Egamma Tracking master review-pending-level-1 labels

CI Result SUCCESS (hash 7c7567a0)

	Athena	AthSimulation	AthGeneration	AnalysisBase
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 23123]

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

merged

mentioned in commit 60f3af87

added sweep:ignore label