[gnome-desktop-testing] Fix default test location

[Jasper St. Pierre <jstpierre src gnome org>]

commit eb2e88d5da214387ef6e22a9ead6e0c869056bfd
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Thu Apr 25 22:32:57 2013 -0400

    Fix default test location
    
    Arrays are always true. Whoops.

 src/gnome-desktop-testing-runner.js |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gnome-desktop-testing-runner.js b/src/gnome-desktop-testing-runner.js
index a85eeba..d95b9ef 100755
--- a/src/gnome-desktop-testing-runner.js
+++ b/src/gnome-desktop-testing-runner.js
@@ -93,7 +93,7 @@ function runTestsInDirectory(file) {
 
 let testDirs = ARGV.slice();
 
-if (!testDirs) {
+if (testDirs.length == 0) {
     testDirs = ['/usr/share/installed-tests'];
 }