Fix an uninitialized value in JetDeltaRValueMapProducer

[Dr15Jones]

A member data was only set conditionally. This problem was found
by valgrind.

[cmsbuild]

A new Pull Request was created by @Dr15Jones (Chris Jones) for CMSSW_7_5_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]

@cmsbuild please test
.. seems trivial though

[cmsbuild]

The tests are being triggered in jenkins.

[slava77]

+1

for #9693 99ef854

• the same code change as in Fix an uninitialized value in JetDeltaRValueMapProducer #9694 (tests there completed ok)

[slava77]

@cmsbuild please test
(it looks like the last build failed for whatever reason)

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_5_X IBs or unless it breaks tests. This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @Degano, @smuzaffar