Ca: bugfix with nans in the track fit

A fix for the redmine issue: https://redmine.cbm.gsi.de/issues/2981#change-14601

Edit for Redmine linking: Refs #2981

requested review from @s.zharko

assigned to @se.gorbunov

added 4 commits

• e123a2ae...932c352a - 3 commits from branch computing:master
• de5e75cd - Ca: bugfix with nans in the track fit

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added BugFix Tracking labels

changed the description

added 3 commits

• de5e75cd...881b0f41 - 2 commits from branch computing:master
• 2b1a2254 - Ca: bugfix with nans in the track fit

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Dear @f.uhlig, @v.friese, @p.-a.loizeau,

you have been identified as code owner of at least one file which was changed with this merge request.

Please check the changes and approve them or request changes.

added CodeOwners label

merged