[fw-general] bug with Zend_Loader

[Jacky Chen]

Hi,
file_exists() function can't detect the file included with include_path. the
rv9295 of Zend_Loader::isReadable() detect a file if readable as following:

if (!file_exists($filename) || !$fh = @fopen($filename, 'r', true)) {
       return false;
}