[SUSYTool]: Add check for empty tools in ST

Adding some checks to ensure that the tool in ST is not empty before proceeding @mhank

requested review from @mhank

assigned to @sridouan

This merge request affects 1 package:

• PhysicsAnalysis/SUSYPhys/SUSYTools

This merge request affects 1 file:

• PhysicsAnalysis/SUSYPhys/SUSYTools/Root/Electrons.cxx

Adding @miholzbo ,@cohm ,@zmarshal ,@salderwe ,@mrimoldi ,@janders ,@cmerlass as watchers

added Analysis Egamma SUSYTools analysis-review-required main review-pending-level-1 labels

CI Result SUCCESS (hash c2e04963)

	AnalysisBase	AthAnalysis
externals
cmake
make
tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
For experts only: Jenkins output (remote access info)

added analysis-review-approved label and removed analysis-review-required label

Changes are fine and CI succeeds, approving for L1. -L1

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

merged

mentioned in commit 542bcc42