Fix arginfo for interface static method without parameters
Fix arginfo for interface static method without parameters

vpg/zephir,zephir-lang/zephir,vpg/zephir,vpg/zephir,phalcon/zephir,phalcon/zephir,phalcon/zephir,zephir-lang/zephir,vpg/zephir,zephir-lang/zephir,zephir-lang/zephir,phalcon/zephir,phalcon/zephir,zephir-lang/zephir,vpg/zephir,phalcon/zephir,vpg/zephir