Add protection against 0-element uGtAlgoBlocks in HLTL1TSeed module

[Martin-Grunewald]

Add protection against 0-element uGtAlgoBlocks in HLTL1TSeed module
Fix formatting
From @rekovic
Backport of #13509

[cmsbuild]

A new Pull Request was created by @Martin-Grunewald (Martin Grunewald) for CMSSW_8_0_X.

It involves the following packages:

HLTrigger/HLTfilters

@Martin-Grunewald, @perrotta, @cmsbuild, @davidlange6, @fwyzard can you please review it and eventually sign? Thanks.
@slava77, @Degano, @smuzaffar you are the release manager for this.

cms-bot commands are list here #13028

[Martin-Grunewald]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/11591/console

[cmsbuild]

Pull request #13510 was updated. @Martin-Grunewald, @perrotta, @cmsbuild, @davidlange6, @fwyzard can you please check and sign again.

[cmsbuild]

+1
Tested at: cc32556
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13510/11591/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13510/11591/summary.html

[Martin-Grunewald]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/11593/console

[Martin-Grunewald]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_8_0_X IBs after it passes the integration tests. This pull request requires discussion in the ORP meeting before it's merged. @slava77, @davidlange6, @Degano, @smuzaffar

[cmsbuild]

+1
Tested at: 7753ae9
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13510/11593/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13510/11593/summary.html

[davidlange6]

+1