Fix for bug 248172 (XMLSerializer corrupts namespace prefixes when XHTML namespace is used). r=sicking, sr=jst.

content/html/content/src/nsGenericHTMLElement.cpp

@@ -1661,7 +1661,7 @@ nsGenericHTMLElement::SetAttrAndNotify(PRInt32 aNamespaceID,
   }
   else {
     nsCOMPtr<nsINodeInfo> ni;
-    rv = mNodeInfo->NodeInfoManager()->GetNodeInfo(aAttribute, nsnull,
+    rv = mNodeInfo->NodeInfoManager()->GetNodeInfo(aAttribute, aPrefix,
                                                    aNamespaceID,
                                                    getter_AddRefs(ni));
     NS_ENSURE_SUCCESS(rv, rv);

content/xul/content/src/nsXULElement.cpp

@@ -2121,7 +2121,7 @@ nsXULElement::SetAttrAndNotify(PRInt32 aNamespaceID,
     }
     else {
         nsCOMPtr<nsINodeInfo> ni;
-        rv = NodeInfo()->NodeInfoManager()->GetNodeInfo(aAttribute, nsnull,
+        rv = NodeInfo()->NodeInfoManager()->GetNodeInfo(aAttribute, aPrefix,
                                                         aNamespaceID,
                                                         getter_AddRefs(ni));
         NS_ENSURE_SUCCESS(rv, rv);