Fix hexdigest() call

diff --git a/ud-mailgate b/ud-mailgate
index 29a2873..fb5b7ba 100755 (executable)
--- a/ud-mailgate
+++ b/ud-mailgate
@@ -100,7 +100,7 @@ def make_hmac(str):
    key = F.readline().strip()
    F.close();
 
-   return hmac.new(key, str, sha1_module).hexdigest
+   return hmac.new(key, str, sha1_module).hexdigest()