minor #2582 Fix PHP 5.3 Travis build (c960657)
minor #2582 Fix PHP 5.3 Travis build (c960657)

This PR was merged into the 1.x branch.

Discussion
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Fix PHP 5.3 Travis build

PHP 5.3 is only supported on Debian Precise.

Commits
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3a45bd48 Fix PHP 5.3 build

nicolas-grekas/Twig,nicolas-grekas/Twig,nicolas-grekas/Twig,twigphp/Twig,nicolas-grekas/Twig,twigphp/Twig,nicolas-grekas/Twig,twigphp/Twig