fix method getVenue

method getVenue build wrong urlString

https://api.foursquare.com/v2/venues/true&client_id=MY_CLIENT_ID&client_secret=MY_SECRET_ID&v=20130110

When viewing the source code, I found the following lines (line numbers: 174-180)
urlString += params.venue_id != null;
if (client_id != null) {
urlString += "&client_id=" + client_id;
}
if (client_secret != null) {
urlString += "&client_secret=" + client_secret;
}
I know how to fix this error, but on deploy it will appear again

Please fix this error
P.s. sorry for my bad english :)