Bug 374334 - Uncaught exception with cloneNode method and frameset element. Patch by Alex Vincent <ajvincent@gmail.com>. r=jst,sr=jst

git-svn-id: svn://10.0.0.236/trunk@229403 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/dom/src/base/nsJSEnvironment.cpp

@@ -1671,7 +1671,7 @@ nsJSContext::CompileEventHandler(nsIAtom *aName,
                                           aURL, aLineNo);
 
   if (!fun) {
-    return NS_ERROR_FAILURE;
+    return NS_ERROR_ILLEGAL_VALUE;
   }
 
   JSObject *handler = ::JS_GetFunctionObject(fun);