fix when decorate('yellow', 0) is passed

When running this task
```js
gulp.task('minify-js', function () {
    ['store', 'global', 'digitalstore'].forEach(function(prop) {
        gulp.src('js/' + prop + '/build/*.js')
            .pipe(changed('js/' + prop, {
                extension: '.min.js'
            }))
            .pipe(filelog())
            .pipe(jshint())
            .pipe(jshint.reporter('default'))
            .pipe(uglify())
            .pipe(rename({suffix: '.min'}))
            .pipe(gulp.dest('js/' + prop))
    });
});
```
I see empty count statements for the properties w/o changed files:
![screen shot 2014-10-30 at 1 00 06 pm](https://cloud.githubusercontent.com/assets/3459542/4847913/3cf9cdbe-6056-11e4-828e-bc65047cf203.png)

This fix will ensure it displays correctly:
![screen shot 2014-10-30 at 1 00 53 pm](https://cloud.githubusercontent.com/assets/3459542/4847925/55db4a6a-6056-11e4-8edc-77e03946deb1.png)