Fix sign reversal in mktime_tz discovered by Bill van Melle.

diff --git a/Lib/rfc822.py b/Lib/rfc822.py
index 9a99572e680aa6e3b1c931328c59b189b50236ea..f58543a9f5c63e42bdf0d20e18e4f251ab7770ff 100644 (file)
--- a/Lib/rfc822.py
+++ b/Lib/rfc822.py
@@ -696,7 +696,7 @@ def mktime_tz(data):
     
     """
     t = time.mktime(data[:8] + (0,))
-    return t + data[9] - time.timezone
+    return t - data[9] - time.timezone
 
 
 # When used as script, run a small test program.