Merge pull request codebutler#14 from orenda/patch-1

Update SocketIOClient.java - onError failed on nullPointerException

Author: koush

src/com/codebutler/android_websockets/SocketIOClient.java

@@ -267,7 +267,8 @@ public void disconnect() throws IOException {
     }
 
     private void cleanup() {
-        mClient.disconnect();
+        if (mClient != null)
+            mClient.disconnect();
         mClient = null;
 
         mSendLooper.quit();