crypto.py: Another missing import.

diff --git a/crypto.py b/crypto.py
index 749ac2a..8ad2737 100644 (file)
--- a/crypto.py
+++ b/crypto.py
@@ -23,6 +23,8 @@
 ### License along with Chopwood; if not, see
 ### <http://www.gnu.org/licenses/>.
 
+from struct import pack, unpack
+
 ###--------------------------------------------------------------------------
 ### The core of MD5.