}
{ uschar *m;
-if (m = is_tainted2(cmd, 0, "Tainted '%s' (command "
- "for %s transport) not permitted", cmd, tblock->name))
+if ((m = is_tainted2(cmd, 0, "Tainted '%s' (command "
+ "for %s transport) not permitted", cmd, tblock->name)))
{
addr->transport_return = PANIC;
addr->message = m;