Fix to getElementsByTagName which only shows up when using XMLDocument. Thanks to Andrew Kuchling.

lib/python/OFS/ZDOM.py

@@ -438,8 +438,9 @@ class Element(Node):
             if (child.getNodeType()==ELEMENT_NODE and \
                     child.getTagName()==tagname or tagname== '*'):
                 nodeList.append(child)
-            n1 = child.getElementsByTagName(tagname)
-            nodeList = nodeList + n1._data
+            if hasattr(child, 'getElementsByTagName'):
+                n1 = child.getElementsByTagName(tagname)
+                nodeList = nodeList + n1._data
         return NodeList(nodeList)
    
 
@@ -615,4 +616,4 @@ class Attr(Acquisition.Implicit, Node):
         original document, this is true; otherwise, it is false."""
         return self.specified
         
-        
\ No newline at end of file
+