Update loading-bar.js

[brunoporto]

response.config return: "undefined .config" on offline connection. Added "response!=undefined &&" to prevent this.

[chieffancypants]

I'm not sure I understand this -- why would an offline connection not return a response when it's mandated by angular?

[brunoporto]

if you have a web app on localhost and the server "break down".

[chieffancypants]

Do you have other interceptors in use?

[brunoporto]

angular-growl-2 break too, same solution: JanStevens/angular-growl-2#50

[chieffancypants]

@brunoporto take a look at #50, which is likely what's happening. Another discussion at #132 where perhaps I'll fix this once and for all, but it won't be by simply ignoring the error.

Thanks for the PR, but based on #132, I'll probably end up logging the error to raise awareness.

[brunoporto]

is not just ignore the error ... no response = no loading bar. responsibility for handling this error is not of this plugin