fixed stale fraction parsing

diff --git a/p2pool/main.py b/p2pool/main.py
index 0c80b6e..e20a00e 100644 (file)
--- a/p2pool/main.py
+++ b/p2pool/main.py
@@ -625,7 +625,7 @@ def main(args):
         
         
         def read_stale_frac(share):
-            if len(share.nonce) != 20:
+            if len(share.nonce) < 4:
                 return None
             a, b = struct.unpack("<HH", share.nonce[-4:])
             if a != b: