Remove vector reserve in SeedGeneratorFromRegionHits

[mark-grimes]

Removes a vector reserve that at 140 pileup massively overestimates the size required. Removing it does not noticeably increase runtime. Memory use and timing before and after were presented in the 05/Jun/2014 reconstruction meeting (https://indico.cern.ch/event/321540/session/4/contribution/13/material/slides/0.pdf).

[cmsbuild]

A new Pull Request was created by @mark-grimes (Mark Grimes) for CMSSW_6_2_X_SLHC.

Remove vector reserve in SeedGeneratorFromRegionHits

It involves the following packages:

RecoTracker/TkSeedGenerator

@nclopezo, @cmsbuild, @Degano, @StoyanStoynev, @slava77 can you please review it and eventually sign? Thanks.
@ghellwig, @GiacomoSguazzoni, @rovere, @gpetruc, @cerati, @venturia this is something you requested to watch as well.
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@fratnikov, @mark-grimes you are the release manager for this.
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[mark-grimes]

merge