zero out content of all krb5_free_x_content like functions to make sure data doesnt get reused, idea from Wynn Wilkes <wwilkes@vintela.com>

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@15167 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/krb5/addr_families.c

@@ -1033,6 +1033,7 @@ krb5_free_address(krb5_context context,
     if(a != NULL && a->free_addr != NULL)
 	return (*a->free_addr)(context, address);
     krb5_data_free (&address->address);
+    memset(address, 0, sizeof(*address));
     return 0;
 }