Fix warning: 'mzbtemp' may be used uninitialized

[iarspider]

PR description:

This PR fixes the following warning seen in PPC builds:

/scratch/cmsbuild/jenkins_a/workspace/build-any-ib/w/tmp/BUILDROOT/ec2e2d6b67708ad491c755cf4edb383f/opt/cmssw/slc7_ppc64le_gcc11/cms/cmssw/CMSSW_12_4_X_2022-03-29-2300/src/L1Trigger/L1TTrackMatch/plugins/L1TrackJetProducer.cc: In member function 'void L1TrackJetProducer::L2_cluster(std::vector<edm::Ptr<TTTrack<edm::Ref<edm::DetSetVector<Phase2TrackerDigi>, Phase2TrackerDigi> > > >, std::vector<int>, MaxZBin&)':
  /scratch/cmsbuild/jenkins_a/workspace/build-any-ib/w/tmp/BUILDROOT/ec2e2d6b67708ad491c755cf4edb383f/opt/cmssw/slc7_ppc64le_gcc11/cms/cmssw/CMSSW_12_4_X_2022-03-29-2300/src/L1Trigger/L1TTrackMatch/plugins/L1TrackJetProducer.cc:250:18: warning: 'mzbtemp' may be used uninitialized [-Wmaybe-uninitialized]
   250 |     all_zBins[z] = mzbtemp;
      |     ~~~~~~~~~~~~~^~~~~~~~~
/scratch/cmsbuild/jenkins_a/workspace/build-any-ib/w/tmp/BUILDROOT/ec2e2d6b67708ad491c755cf4edb383f/opt/cmssw/slc7_ppc64le_gcc11/cms/cmssw/CMSSW_12_4_X_2022-03-29-2300/src/L1Trigger/L1TTrackMatch/plugins/L1TrackJetProducer.cc:248:11: note: 'mzbtemp' declared here
  248 |   MaxZBin mzbtemp;
      |           ^~~~~~~

[iarspider]

please test for slc7_ppc64le_gcc11

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-37408/29072

• This PR adds an extra 16KB to repository

[cmsbuild]

A new Pull Request was created by @iarspider for master.

It involves the following packages:

• L1Trigger/L1TTrackMatch (upgrade, l1)

@epalencia, @AdrianoDee, @srimanob, @cecilecaillol, @rekovic can you please review it and eventually sign? Thanks.
@Martin-Grunewald, @missirol this is something you requested to watch as well.
@perrotta, @dpiparo, @qliphy you are the release manager for this.

cms-bot commands are listed here

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-7a6977/23519/summary.html
COMMIT: 9f7c8a1
CMSSW: CMSSW_12_4_X_2022-03-29-2300/slc7_ppc64le_gcc11
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmssw/37408/23519/install.sh to create a dev area with all the needed externals and cmssw changes.

[cecilecaillol]

+l1

[srimanob]

+Upgrade

Technical PR.

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next master IBs (tests are also fine). This pull request will now be reviewed by the release team before it's merged. @perrotta, @dpiparo, @qliphy (and backports should be raised in the release meeting by the corresponding L2)

[perrotta]

+1

[perrotta]

ping bot