Merge pull request #29 from urandom/patch-1

This is most likely a typo

Author: mitsuhiko

flaskext/oauth.py

@@ -254,7 +254,7 @@ def request(self, url, data="", headers=None, format='urlencoded',
         url = self.expand_url(url)
         if method == 'GET':
             assert format == 'urlencoded'
-            if not data:
+            if data:
                 url = add_query(url, data)
                 data = ""
         else: