clear only neccessary part of spl_filesystem_object

Author: dstogov

ext/spl/spl_directory.c

@@ -155,7 +155,10 @@ static zend_object *spl_filesystem_object_new_ex(zend_class_entry *class_type)
 {
 	spl_filesystem_object *intern;
 
-	intern = zend_object_alloc(sizeof(spl_filesystem_object), class_type);
+	intern = emalloc(sizeof(spl_filesystem_object) + zend_object_properties_size(class_type));
+	memset(intern, 0,
+		MAX(XtOffsetOf(spl_filesystem_object, u.dir.entry),
+			XtOffsetOf(spl_filesystem_object, u.file.escape) + sizeof(int)));
 	/* intern->type = SPL_FS_INFO; done by set 0 */
 	intern->file_class = spl_ce_SplFileObject;
 	intern->info_class = spl_ce_SplFileInfo;

ext/spl/spl_directory.h

@@ -68,13 +68,13 @@ struct _spl_filesystem_object {
 	union {
 		struct {
 			php_stream         *dirp;
-			php_stream_dirent  entry;
 			zend_string        *sub_path;
 			int                index;
 			int                is_recursive;
 			zend_function      *func_rewind;
 			zend_function      *func_next;
 			zend_function      *func_valid;
+			php_stream_dirent  entry;
 		} dir;
 		struct {
 			php_stream         *stream;