apply @ndossche suggestion

Author: devnexen

ext/dom/node.c

@@ -2181,15 +2181,6 @@ static void dom_relink_ns_decls_element(HashTable *links, xmlNodePtr node)
 			}
 		}
 
-		if (node->ns) {
-			dom_add_synthetic_ns_decl(links, node, node->ns);
-		}
-		for (xmlAttrPtr attr = node->properties; attr; attr = attr->next) {
-			if (attr->ns && !php_dom_ns_is_fast((const xmlNode *) attr, php_dom_ns_is_xmlns_magic_token)) {
-				dom_add_synthetic_ns_decl_for_attr(links, node, attr->ns);
-			}
-		}
-
 		/* The default namespace is handled separately from the other namespaces in C14N.
 		 * The default namespace is explicitly looked up while the other namespaces are
 		 * deduplicated and compared to a list of visible namespaces. */
@@ -2198,6 +2189,14 @@ static void dom_relink_ns_decls_element(HashTable *links, xmlNodePtr node)
 			 * can return the current namespace. */
 			zend_hash_index_add_new_ptr(links, (zend_ulong) node | 1, node->ns);
 			node->ns = xmlSearchNs(node->doc, node, NULL);
+		} else if (node->ns) {
+			dom_add_synthetic_ns_decl(links, node, node->ns);
+		}
+
+		for (xmlAttrPtr attr = node->properties; attr; attr = attr->next) {
+			if (attr->ns && !php_dom_ns_is_fast((const xmlNode *) attr, php_dom_ns_is_xmlns_magic_token)) {
+				dom_add_synthetic_ns_decl_for_attr(links, node, attr->ns);
+			}
 		}
 	}
 }