added protection for zero pt ghost candidates

[davidlange6]

also in 741patchX cycle

[cmsbuild]

A new Pull Request was created by @davidlange6 (David Lange) for CMSSW_7_4_1_patchX.

added protection for zero pt ghost candidates

It involves the following packages:

PhysicsTools/JetMCAlgos

@cmsbuild, @vadler, @monttj can you please review it and eventually sign? Thanks.
@ferencek, @acaudron, @pvmulder, @imarches this is something you requested to watch as well.
You can sign-off by replying to this message having '+1' in the first line of your reply.
You can reject by replying to this message having '-1' in the first line of your reply.
If you are a L2 or a release manager you can ask for tests by saying 'please test' in the first line of a comment.

Note that this branch is designed for requested bug fixes specific to the CMSSW_7_4_1 release.
If you wish to make a pull request for the CMSSW_7_4_X release cycle, please use the CMSSW_7_4_X branch instead

[monttj]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_4_1_patchX IBs once checked with relvals in the development release cycle of CMSSW or unless it breaks tests.