[DependencyInjection] fix PhpDumper#12823

Merged

fabpot merged 2 commits intosymfony:2.6from

nicolas-grekas:fix-php-dumper

Dec 3, 2014

Commits on Dec 3, 2014

Revert "minor #10241 [DependencyInjection] made some perf improvements (fabpot)"
nicolas-grekas
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[DependencyInjection] keep some of the reverted perf optim
nicolas-grekas
committed