Notice when submitting form

I get a notice when a form has been submitted when there is a street. PHP says that the value is not defined.

The line was:
$data[‘street’] .= $value;

And $data[‘street’] is not defined.

I have fixed this, can you implement this in a new version Zack?

http://ww.wp.xz.cn/extend/plugins/gravity-forms-salesforce/