openshift guide, empty js array err fix

README.md

@@ -64,3 +64,43 @@ The **blue line** - this represents the dropping size of the outstanding Issues
 There is nothing to save in a database so each refresh of the page fetches all of the latest information from GitHub.
 
 Enjoy!
+
+## Redhat OpenShift:
+
+Create an account at [http://openshift.redhat.com](http://openshift.redhat.com) specifying a Node.js 0.6 "Web Cartridge" specifying the url for the app.
+
+Install the OpenShift [client tools](https://openshift.redhat.com/app/getting_started).
+
+Add your public key from `~/.ssh/id_rsa.pub` to your account. You can use xclip to copy the key to the clipboard:
+
+```bash
+$ xclip -sel clip < ~/.ssh/id_rsa.pub
+```
+
+Add the remote repository, like:
+
+```bash
+$ git remote add openshift ssh://[username_hash]@burndown-intermine.rhcloud.com/~/git/burndown.git/
+```
+
+Push your changes:
+
+```bash
+$ git push -u openshift master
+```
+
+### Debugging
+
+In case of trouble, use the OpenShift client tools to debug:
+
+```bash
+$ /var/lib/gems/1.8/bin/rhc domain status
+```
+
+To determine the status of the app, run:
+
+```bash
+$ /var/lib/gems/1.8/bin/rhc-app status -a burndown
+```
+
+You can also SFTP into your instance on port `22` [sftp://burndown-intermine.rhcloud.com](sftp://burndown-intermine.rhcloud.com) or SSH to it.

package.json

@@ -1,6 +1,6 @@
 {
     "name": "github-burndown-chart",
-    "version": "0.1.3",
+    "version": "0.1.4",
     "private": true,
     "dependencies": {
         "coffee-script": "1.3.3",

templates/burndown.eco

@@ -84,6 +84,9 @@
         i++;
     <% end %>
 
+    // Early exit to avoid Rickshaw error.
+    if (actual.length == 0) return;
+
     // The line graph.
     var graph = new Rickshaw.Graph({
         element: document.querySelector("#chart"),