_gasTrackDownloads fails when opts.category only is present

[googleanalyticsresoneo]

_gas.push(['_gasTrackDownloads', {category: 'Téléchargements'}]);
will fail because opts['extensions'] is never created when only a category option is present

var _trackDownloads = function (opts) {
    var gh = this;
    if (!gh._downloadTracked) {
        gh._downloadTracked = true;
    } else {
        //Oops double tracking detected.
        return false;
    }
    if (!opts) {
        opts = {'extensions': []};
    } else if (typeof opts === 'string') {
        // support legacy opts as String of extensions
        opts = {'extensions': opts.split(',')};
    } else if (opts.length >= 1) {
        // support legacy opts Array of extensions
        opts = {'extensions': opts};
    }
    opts['category'] = opts['category'] || 'Download';

    var ext = 'xls,xlsx,doc,docx,ppt,pptx,pdf,txt,zip';
    ext += ',rar,7z,exe,wma,mov,avi,wmv,mp3,csv,tsv';
    ext = ext.split(',');
    opts['extensions'] = opts['extensions'].concat(ext);

Exception TypeError
: Cannot call method 'concat'0 of undefined

[tomfuertes]

Good find! Would you like to take at the PR on this one?

[googleanalyticsresoneo]

Sorry Tom but what does PR mean ? (I'm not so used to github processes)

[googleanalyticsresoneo]

A Pull Request ?!
https://help.github.com/articles/using-pull-requests
I can give it a try, but feel free to revise it completely :-)

[tomfuertes]

Yep a Pull Request! :) Happy to revise.

[googleanalyticsresoneo]

From which branch should I perform the edit ?

[tomfuertes]

Develop

-Tom (via phone)

On Mar 11, 2014, at 12:36 PM, RESONEO Google Analytics notifications@github.com wrote:

From which branch should I perform the edit ?

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