setting plausible default value for struct members

especially for unsigned members so they don't casted to max unsigned
Merge branch 'PHP-5.5'

* PHP-5.5:
  setting plausible default value for struct members
Remove spurious int cast in between two longs
Merge branch 'PHP-5.3' into PHP-5.4

* PHP-5.3:
  Remove spurious int cast in between two longs
Merge branch 'PHP-5.4' into PHP-5.5

* PHP-5.4:
  Remove spurious int cast in between two longs
Merge branch 'PHP-5.5'

* PHP-5.5:
  Remove spurious int cast in between two longs
Merge branch 'master' of git.php.net:php-src