Fixed wrong onFailure -> onSuccess fallback, android-async-http#895

Author: smarek

library/src/main/java/com/loopj/android/http/SaxAsyncHttpResponseHandler.java

@@ -144,6 +144,6 @@ public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
     @Override
     public void onFailure(int statusCode, Header[] headers,
                           byte[] responseBody, Throwable error) {
-        onSuccess(statusCode, headers, handler);
+        onFailure(statusCode, headers, handler);
     }
 }