isEqualNode:

    - check for NULL value.
    - if children length is not the same -> return false.


git-svn-id: https://svn.apache.org/repos/asf/xerces/c/trunk@174108 13f79535-47bb-0310-9956-ffa450edef68

src/xercesc/dom/impl/DOMParentNode.cpp

@@ -404,7 +404,7 @@ void DOMParentNode::normalize()
 
 bool DOMParentNode::isEqualNode(const DOMNode* arg)
 {
-    if (castToNodeImpl(this)->isEqualNode(arg))
+    if (arg && castToNodeImpl(this)->isEqualNode(arg))
     {
         DOMNode *kid, *argKid;
         for (kid = fFirstChild, argKid = arg->getFirstChild();
@@ -414,7 +414,7 @@ bool DOMParentNode::isEqualNode(const DOMNode* arg)
             if (!kid->isEqualNode(argKid))
                 return false;
         }
-        return true;
+        return (kid || argKid) ? false : true;
     }
     return false;
 }