Make a _copy_ of the attributes when copying them.

Doh!

Closes RADSECPROXY-53.

ChangeLog

+Changes since 1.6.4
+	Bug fixes:
+	- Fix a crash bug introduced in 1.6.4. Fixes RADSECPROXY-53,
+	bugfix on 1.6.4.
+
 2013-09-05 1.6.4
 	Bug fixes:
 	- Keeping Proxy-State attributes in all replies to clients

radmsg.c

@@ -118,7 +118,7 @@ int radmsg_copy_attrs(struct radmsg *dst,
     int n = 0;
 
     for (node = list_first(list); node; node = list_next(node)) {
-        if (radmsg_add(dst, (struct tlv *) node->data) != 1) {
+        if (radmsg_add(dst, copytlv((struct tlv *) node->data)) != 1) {
             n = -n;
             break;
         }