Add better message it not targetted to admin api

Author: knolleary

lib/result.js

@@ -101,8 +101,10 @@ function logNodeList(nodes) {
         var enabled = node.enabled&&!node.err;
 
         var types = "";
-        for (var j=0;j<node.types.length;j++) {
-            types += (j>0?"\n":"")+(enabled?node.types[j]:node.types[j]);
+        if (node.types) {
+            for (var j=0;j<node.types.length;j++) {
+                types += (j>0?"\n":"")+(enabled?node.types[j]:node.types[j]);
+            }
         }
         if (types.length === 0) {
             types = "none";
@@ -147,11 +149,18 @@ module.exports = {
         console.log(msg);
     },
     warn:function(msg) {
+        if (process.env.NR_TRACE && msg.stack) {
+            console.warn(msg.stack)
+        }
         if (msg.response) {
             if (msg.response.status === 401) {
-                console.warn("Not logged in. Use 'node-red-admin login' to log in.");
+                console.warn("Not logged in. Use 'login' to log in.");
             } else if (msg.response.data) {
-                console.warn(msg.response.status+": "+msg.response.data.message);
+                if (msg.response.status === 404 && !msg.response.data.message) {
+                    console.warn("Node-RED Admin API not found. Use 'target' to set API location");
+                } else {
+                    console.warn(msg.response.status+": "+msg.response.data.message);
+                }
             } else {
                 console.warn(msg.response.status+": "+msg.toString());
             }