fix invalid node pointers

diff --git a/ext/dom/document.c b/ext/dom/document.c
index c3a55e6d1871f3605d96c401a38c27e8c2958621..491681f838da4dcb2140fd3848dd08f24928257a 100644 (file)
--- a/ext/dom/document.c
+++ b/ext/dom/document.c
@@ -260,7 +260,7 @@ int dom_document_encoding_write(dom_object *obj, zval *newval TSRMLS_DC)
        xmlDoc *docp;
        int charset;
 
-       docp = (xmlDoc *) obj->ptr;
+       docp = (xmlDocPtr) dom_object_get_node(obj);
        if (docp->encoding != NULL) {
                xmlFree((xmlChar *)docp->encoding);
        }
@@ -1010,7 +1010,7 @@ PHP_FUNCTION(dom_document_document)
 
        intern = (dom_object *)zend_object_store_get_object(id TSRMLS_CC);
        if (intern != NULL) {
-               olddoc = (xmlDocPtr)intern->ptr;
+               olddoc = (xmlDocPtr) dom_object_get_node(intern);
                if (olddoc != NULL) {
                        decrement_node_ptr(intern TSRMLS_CC);
                        refcount = decrement_document_reference(intern TSRMLS_CC);
@@ -1124,7 +1124,7 @@ static void dom_parse_document(INTERNAL_FUNCTION_PARAMETERS, int mode) {
        if (id != NULL) {
                intern = (dom_object *)zend_object_store_get_object(id TSRMLS_CC);
                if (intern != NULL) {
-                       docp = (xmlDocPtr)intern->ptr;
+                       docp = (xmlDocPtr) dom_object_get_node(intern);
                        if (docp != NULL) {
                                decrement_node_ptr(intern TSRMLS_CC);
                                refcount = decrement_document_reference(intern TSRMLS_CC);