Add a couple of misisng check in xmlRelaxNGCleanupTree
For https://bugzilla.gnome.org/show_bug.cgi?id=733041
check cur->parent before dereferencing the pointer even if
a null parent there should not happen
Also fix a typo
diff --git a/relaxng.c b/relaxng.c
index 4273db3..57ae972 100644
--- a/relaxng.c
+++ b/relaxng.c
@@ -7343,13 +7343,13 @@
if (ns != NULL)
xmlFree(ns);
/*
- * Since we are about to delete cur, if it's nsDef is non-NULL we
+ * Since we are about to delete cur, if its nsDef is non-NULL we
* need to preserve it (it contains the ns definitions for the
* children we just moved). We'll just stick it on to the end
* of cur->parent's list, since it's never going to be re-serialized
* (bug 143738).
*/
- if (cur->nsDef != NULL) {
+ if ((cur->nsDef != NULL) && (cur->parent != NULL)) {
xmlNsPtr parDef = (xmlNsPtr)&cur->parent->nsDef;
while (parDef->next != NULL)
parDef = parDef->next;
@@ -7367,7 +7367,8 @@
else if ((cur->type == XML_TEXT_NODE) ||
(cur->type == XML_CDATA_SECTION_NODE)) {
if (IS_BLANK_NODE(cur)) {
- if (cur->parent->type == XML_ELEMENT_NODE) {
+ if ((cur->parent != NULL) &&
+ (cur->parent->type == XML_ELEMENT_NODE)) {
if ((!xmlStrEqual(cur->parent->name, BAD_CAST "value"))
&&
(!xmlStrEqual