Fixed bug #64007 (There is an ability to create instance of Generator by hand).

Use get_constrctor instead of access of the ce->constructor directly
Merge branch 'PHP-5.5'
Merge fix of #62836 to ?.re, and regenerate ?.c
Merge branch 'PHP-5.4' into PHP-5.5

Conflicts:
	ext/standard/var_unserializer.c
Merge branch 'PHP-5.5'
Merge branch 'master' of https://github.com/php/php-src into accessors

Conflicts:
	ext/standard/var_unserializer.c