Sort of hack fix to getBuses because osutrip returns vehicles and an error

osu-trip.js

@@ -207,7 +207,7 @@ OSUTrip.getBuses = function( route )
 
 			bustimeresponse = xml2js.parseStringSync( response.content )[ 'bustime-response' ];
 
-			if( bustimeresponse.error )
+			if( bustimeresponse.error && bustimeresponse.vehicle.length == 0 )
 			{
 				throw bustimeresponse.error;
 			}
@@ -246,4 +246,4 @@ OSUTrip.getBuses = function( route )
 	{
 		throw 'API key required';
 	}
-}
\ No newline at end of file
+}