console is undefined in HtmlUnit, so we need a guard.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@30490 71c3de6d-444a-0410-be80-ed276b4c234a

war/resources/scripts/hudson-behavior.js

@@ -968,7 +968,7 @@ function refillOnChange(e,onChange) {
         v.split(" ").each(function (name) {
             var c = findNearBy(e,name);
             if (c==null) {
-                console.warn("Unable to find nearby "+name);
+                if (console!=null)  console.warn("Unable to find nearby "+name);
                 YUI.log("Unable to find a nearby control of the name "+name,"warn")
                 return;
             }