src/cfg.c: fix potential segfault when printing config

When program log is not set it is set to NULL, which is
passed to strlen, which can cause segfault.

Signed-off-by: Michał Łyszczek <michal.lyszczek@bofc.pl>

1 files changed, 4 insertions, 1 deletions

diff --git a/src/cfg.c b/src/cfg.c
index 4d5cab8..916d00e 100644
--- a/src/cfg.c
+++ b/src/cfg.c
@@ -243,7 +243,10 @@ void psmqd_cfg_print(void)
 #endif
 	CONFIG_PRINT(log_level, "%d");
 	CONFIG_PRINT(colorful_output, "%d");
-	CONFIG_PRINT(program_log, "%s");
+	if (g_psmqd_cfg.program_log)
+		CONFIG_PRINT(program_log, "%s");
+	else
+		CONFIG_PRINT(program_log, "(stderr)");
 	CONFIG_PRINT(broker_name, "%s");
 	CONFIG_PRINT(broker_maxmsg, "%d");
 	CONFIG_PRINT(remove_queue, "%d");