Merge branch 'PHP-5.4' of https://git.php.net/repository/php-src into PHP-5.4

* 'PHP-5.4' of https://git.php.net/repository/php-src:
  Suppress compliation warning "warning: passing argument 1 of ‘_efree’ discards qualifiers from pointer target type"
Suppress compiler warning "warning: variable ‘retcount’ set but not used [-Wunused-but-set-variable]"
Suppress compiler warning "warning: variable ‘length’ set but not used [-Wunused-but-set-variable]"