minor #116 Php70: do not expose intArg (glensc)
minor #116 Php70: do not expose intArg (glensc)

This PR was merged into the 1.8-dev branch.

Discussion
----------

Php70: do not expose intArg

`Php70::intArg` is used from `Php70` class only. make it private.

project search result: https://github.com/symfony/polyfill/search?q=intArg&type=Code

Commits
-------

c36388c Php70: do not expose intArg

symfony/polyfill-php70