Fix an error due to a missing import in binder.py

Thanks Doza for reporting!

diff --git a/tweepy/binder.py b/tweepy/binder.py
index 8347ebd67cdb28b7a666c4a59cb2509e922a4af1..bd508a57a00c1290cd9360b4936e3fdcbe3b6ff6 100644 (file)
--- a/tweepy/binder.py
+++ b/tweepy/binder.py
@@ -8,6 +8,7 @@ import time
 import re
 
 from tweepy.error import TweepError
+from tweepy.utils import convert_to_utf8_str
 
 re_path_template = re.compile('{\w+}')