do not print empty rdatasets

diff --git a/dns/node.py b/dns/node.py
index bfe8c073bd7eff0f22ff34ea168c287a6abc61d7..630e32a1279f094d0e5589e740e19f0c825d0a25 100644 (file)
--- a/dns/node.py
+++ b/dns/node.py
@@ -49,7 +49,8 @@ class Node(object):
 
         s = io.StringIO()
         for rds in self.rdatasets:
-            print(rds.to_text(name, **kw), file=s)
+            if len(rds) > 0:
+               print(rds.to_text(name, **kw), file=s)
         return s.getvalue()[:-1]
 
     def __repr__(self):