Fix travis build by guarding against zero process.stdout.columns

Author: andyhot

lib/models/logger.js

@@ -19,7 +19,9 @@ var Logger = CoreObject.extend({
   },
 
   flush: function() {
-    var maxWidth = process.stdout.columns - 4;
+    // guard against environments such as travis that report zero columns
+    var columns = process.stdout.columns || 80;
+    var maxWidth = columns - 4;
     var halfWidth = Math.floor(maxWidth / 2);
     var table = new Table({
       head: ['Source', 'Destination'],