Merge branch 'PHP-5.5' into PHP-5.5-opcache

* PHP-5.5:
  Fixed compiler warning "cast from pointer to integer of different size"
Added an optimization pass to convert FCALL_BY_NAME into DO_FCALL.
Disable FCALL optimization pass for PHP older than 5.4
  Disable FCALL optimization pass for PHP older than 5.4
  Added an optimization pass to convert FCALL_BY_NAME into DO_FCALL.