Fix handling of server which follows a RCPT 452 with a 250. Bug 26092

[exim.git] / src / exim_monitor / em_log.c

diff --git a/src/exim_monitor/em_log.c b/src/exim_monitor/em_log.c
index 348f0642f4854d97a25266fc02fae9af58484eba..1e1dc7c04c424e76a5d437548ba1a22b920f7fa6 100644 (file)
--- a/src/exim_monitor/em_log.c
+++ b/src/exim_monitor/em_log.c
@@ -365,8 +365,9 @@ if (log_datestamping)
   {
   uschar log_file_wanted[256];
   /* Do *not* use "%s" here, we need the %D datestamp in the log_file string to
-  be expanded. */
-  string_format(log_file_wanted, sizeof(log_file_wanted), CS log_file);
+  be expanded.  The trailing NULL arg is to quieten preprocessors that need at
+  least one arg for a variadic set in a macro. */
+  string_format(log_file_wanted, sizeof(log_file_wanted), CS log_file, NULL);
   if (Ustrcmp(log_file_wanted, log_file_open) != 0)
     {
     if (LOG != NULL)