Bug: gformInitSpinner declared multiple times in same scope

When using multiple ajax enabled forms the function gformInitSpinner is declared multiple times in the same scope.

It's easy to fix.

Instead of:

function gformInitSpinner(){
    //etc
}
jQuery(document).ready(function($){
    gformInitSpinner();
}

do:

(function($) {
    function gformInitSpinner(){
        //etc
    }
    jQuery(document).ready(function($){
        gformInitSpinner();
    }
})(jQuery)