TrigFTKSim: Fix compilation warnings.

Compilation warnings: signed/unsigned comparisons.

This merge request affects 1 package:

• Trigger/TrigFTK/TrigFTKSim

Adding @benhoob ,@jahreda ,@karolos ,@mswiatlo ,@jkuechle as watchers

added Trigger master review-pending-level-1 labels

added alsoTargeting:21.3 label

Adding 21.3 as a sweep target, so we (hopefully) keep compatibility between branches

CI Result SUCCESS

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-24379-2019-06-22-01-29
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 1
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 574]

merged

mentioned in commit b340f44b

added sweep:done label

mentioned in commit 0380eea1

Sweep summary
successful:

• 21.3

(see https://aiatlas154.cern.ch/jenkins/job/auto_git_sweeps/822/console for details)

mentioned in merge request !24396 (merged)

mentioned in commit 0d44e537

mentioned in merge request !26017 (merged)

mentioned in commit e5917b77