Protect possible rare FPEs in trigger

Add some protection in attempt to avoid rare FPEs observed in trigger ATLASRECTS-7659

This merge request affects 1 package:

• Tracking/TrkVertexFitter/TrkVKalVrtCore

This merge request affects 1 file:

• Tracking/TrkVertexFitter/TrkVKalVrtCore/src/VtCFit.cxx

added 24.0 Tracking review-pending-level-1 labels

CI Result SUCCESS (hash 0c1159c0)

	Athena
externals
cmake
make
tests

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Athena: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-EL9 6708] (remote access info)

MR looks good to me thus approving - L1 shifter

removed review-pending-level-1 label

added review-approved label

added review-approved-tier0 label

mentioned in commit 8a8c4a7c

merged

mentioned in merge request !70026 (merged)