Merge pull request #147 from shinnn/fix-badge

show build status for only current master branch

Author: calvinmetcalf

README.md

@@ -1,6 +1,6 @@
 # readable-stream
 
-***Node-core streams for userland*** [![Build Status](https://travis-ci.org/nodejs/readable-stream.svg)](https://travis-ci.org/nodejs/readable-stream)
+***Node-core streams for userland*** [![Build Status](https://travis-ci.org/nodejs/readable-stream.svg?branch=master)](https://travis-ci.org/nodejs/readable-stream)
 
 
 [![NPM](https://nodei.co/npm/readable-stream.png?downloads=true&downloadRank=true)](https://nodei.co/npm/readable-stream/)