This is a revert of
https://github.com/GNOME/libxml2/commit/0762c9b69ba01628f72eada1c64ff3d361fb5716

This fixes perl-xml-libxslt test suite
https://bugzilla.suse.com/show_bug.cgi?id=1157450

diff --git a/tree.c b/tree.c
index 08b1a50..f2b1457 100644
--- a/tree.c
+++ b/tree.c
@@ -3664,9 +3664,7 @@ xmlNextElementSibling(xmlNodePtr node) {
 void
 xmlFreeNodeList(xmlNodePtr cur) {
     xmlNodePtr next;
-    xmlNodePtr parent;
     xmlDictPtr dict = NULL;
-    size_t depth = 0;
 
     if (cur == NULL) return;
     if (cur->type == XML_NAMESPACE_DECL) {
@@ -3682,21 +3680,16 @@ xmlFreeNodeList(xmlNodePtr cur) {
 	return;
     }
     if (cur->doc != NULL) dict = cur->doc->dict;
-    while (1) {
-        while ((cur->children != NULL) &&
-               (cur->type != XML_DTD_NODE) &&
-               (cur->type != XML_ENTITY_REF_NODE)) {
-            cur = cur->children;
-            depth += 1;
-        }
-
+    while (cur != NULL) {
         next = cur->next;
-        parent = cur->parent;
 	if (cur->type != XML_DTD_NODE) {
 
 	    if ((__xmlRegisterCallbacks) && (xmlDeregisterNodeDefaultValue))
 		xmlDeregisterNodeDefaultValue(cur);
 
+	    if ((cur->children != NULL) &&
+		(cur->type != XML_ENTITY_REF_NODE))
+		xmlFreeNodeList(cur->children);
 	    if (((cur->type == XML_ELEMENT_NODE) ||
 		 (cur->type == XML_XINCLUDE_START) ||
 		 (cur->type == XML_XINCLUDE_END)) &&
@@ -3727,16 +3720,7 @@ xmlFreeNodeList(xmlNodePtr cur) {
 		DICT_FREE(cur->name)
 	    xmlFree(cur);
 	}
-
-        if (next != NULL) {
-	    cur = next;
-        } else {
-            if ((depth == 0) || (parent == NULL))
-                break;
-            depth -= 1;
-            cur = parent;
-            cur->children = NULL;
-        }
+	cur = next;
     }
 }