Fix an uninitialized value in JetDeltaRValueMapProducer

[cmsbuild]

A member data was only set conditionally. This problem was found
by valgrind.
Automatically ported from CMSSW_7_5_X #9693 (original by @Dr15Jones).

[cmsbuild]

A new Pull Request was created by @cmsbuild for CMSSW_7_6_X.

Fix an uninitialized value in JetDeltaRValueMapProducer

It involves the following packages:

CommonTools/RecoAlgos

@cmsbuild, @cvuosalo, @slava77 can you please review it and eventually sign? Thanks.
@rappoccio, @jdolen, @makortel, @abbiendi, @jhgoh, @ahinzmann this is something you requested to watch as well.
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@Degano you are the release manager for this.
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[slava77]

@davidlange6 @Degano @smuzaffar
Are we going to have auto-forward ports in 76X?

[slava77]

+1

for #9772 99ef854

• this is the same code, the same topic branch as 75X version Fix an uninitialized value in JetDeltaRValueMapProducer #9693 (tested with jenkins and signed)

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_6_X IBs or unless it breaks tests.

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_6_X IBs or unless it breaks tests. This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @Degano, @smuzaffar