# HG changeset patch
# User Adam Chlipala <adam@chlipala.net>
# Date 1451157312 18000
# Node ID 0420bfe96dda81fd939f6b659d0ec90faaf4da8d
# Parent  9ab026c81a2214b4a44972f4662bb07e212ddc63
Fix off-by-one memory allocation error

diff -r 9ab026c81a22 -r 0420bfe96dda mail.c
--- a/mail.c	Wed Dec 31 08:00:42 2014 -0500
+++ b/mail.c	Sat Dec 26 14:15:12 2015 -0500
@@ -75,7 +75,7 @@
 
   address(ctx, s);
   if (h2->to) {
-    uw_Basis_string all = uw_malloc(ctx, strlen(h2->to) + 1 + strlen(s));
+    uw_Basis_string all = uw_malloc(ctx, strlen(h2->to) + 2 + strlen(s));
     sprintf(all, "%s,%s", h2->to, s);
     h2->to = all;
   } else