Expose zend_message_dispatcher_p

Hey: This problem come out when I was figuring a performance issue of Yaf_Loader. Yaf provides a autoloader like PSR0, when doing a classes autoloading. it used to: 1. stat the file, if file does not exists, return 2. zend_compile_file this is okey when you run yaf without opcode cache. but when you run yaf with opcode cache, the first stat syscall become a little waste. since opcode cache always hook the zend_compile_file, and compile the file from cache. so, I changed the autoload to: 1. zend_compile_file 2. if compile failed, then return. but, zend_compile_file will throw warning if the file doesn't exists via zend_message_dispatcher_p so if zend_message_dispatcher_p is ZEND_API, then I can avoid using such mess codes: https://github.com/laruence/php-yaf/blob/master/yaf_loader.c#L377 what do you think? thanks -- Laruence Xinchen Hui http://www.laruence.com/