PyAnalysisUtils: Work around cling issue with detached debug info

When TH1::Draw is called, root tries to call a TCanvas method to create the default canvas. If that method has not been linked, then root will search all DSOs on the library path until it find that method. (This mechanism is separate from the rootmap mechanism.) However, root will also pick up detached debug files during this scan, but will crash trying to read them.

Work around by ensuring thad TPad has been loaded before calling Draw.

This merge request affects 1 package:

• PhysicsAnalysis/PyAnalysis/PyAnalysisUtils

added Analysis master review-pending-level-1 labels

CI Result SUCCESS (hash ad5bd11e)

	Athena	AthSimulation	AnalysisBase	AthGeneration
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
AnalysisBase: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 12457]

The changes look good to me, and CI passes. Approving.

Xiaozhong (L1)

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

mentioned in commit 04b85c80

merged

added sweep:ignore label