Resolve missing-braces error (GCC 7, C++17)

[davidlt]

This is same issue as here: 7d049b8

See #17426

This showed up in slc7_aarch64_gcc700 build.

Signed-off-by: David Abdurachmanov davidlt@cern.ch

[cmsbuild]

A new Pull Request was created by @davidlt for CMSSW_9_0_X.

It involves the following packages:

DataFormats/Math

@cmsbuild, @cvuosalo, @slava77, @davidlange6 can you please review it and eventually sign? Thanks.
@makortel, @felicepantaleo this is something you requested to watch as well.
@davidlange6, @smuzaffar you are the release manager for this.

cms-bot commands are listed here #13028

[davidlt]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/17931/console Started: 2017/02/23 05:14
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/17935/console Started: 2017/02/23 12:41

[cmsbuild]

+1
Tested at: 5ea47c0
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-17611/17935/summary.html

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-17611/17935/summary.html

[slava77]

+1

for #17611 5ea47c0

• technical change in DataFormats/Math/interface/ExtVec.h; as described
• jenkins tests pass

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_9_0_X IBs (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @smuzaffar

[davidlange6]

+1