make sure we only output on exit, if there's a failure

lib/vows.js

@@ -129,7 +129,7 @@ function addVow(vow) {
 // If not, report an error message.
 //
 process.addListener('exit', function () {
-    var results = { honored: 0, broken: 0, errored: 0, pending: 0, total: 0 };
+    var results = { honored: 0, broken: 0, errored: 0, pending: 0, total: 0 }, failure;
 
     vows.suites.forEach(function (s) {
         if ((s.results.total > 0) && (s.results.time === null)) {
@@ -138,14 +138,15 @@ process.addListener('exit', function () {
         }
         s.batches.forEach(function (b) {
             if (b.status !== 'end') {
+                failure = true;
                 results.errored ++;
                 results.total ++;
                 vows.reporter.report(['error', { error: "A callback hasn't fired", batch: b, suite: s }]);
             }
             Object.keys(results).forEach(function (k) { results[k] += b[k] });
         });
     });
-    if (results.total) {
+    if (failure) {
         sys.puts(console.result(results));
     }
 });