Fix in TSGForOI muons

[davidlange6]

for 926patch1

[cmsbuild]

A new Pull Request was created by @davidlange6 (David Lange) for CMSSW_9_2_6_patchX.

It involves the following packages:

RecoMuon/TrackerSeedGenerator

@perrotta, @cmsbuild, @slava77 can you please review it and eventually sign? Thanks.
@bellan, @abbiendi, @jhgoh, @echapon, @calderona, @HuguesBrun, @battibass, @trocino, @bachtis, @rociovilar this is something you requested to watch as well.
@davidlange6 you are the release manager for this.
Note that this branch is designed for requested bug fixes specific to the CMSSW_9_2_6 release.
If you wish to make a pull request for the CMSSW_9_2_X release cycle, please use the CMSSW_9_2_X branch instead

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