fix: add null check before freeing main_ctl in free_main_control function

liudf0716 · liudf0716 · commit 12ebd10e647c · 2024-11-13T22:26:31.000+08:00
Signed-off-by: Dengfeng Liu &lt;liudf0716@gmail.com&gt;
diff --git a/control.c b/control.c
@@ -891,8 +891,10 @@ init_main_control()
 static void 
 free_main_control()
 {
-	SAFE_FREE(main_ctl);
-	main_ctl = NULL;
+	if (main_ctl) {
+		free(main_ctl);
+		main_ctl = NULL;
+	}
 }
 
 static void
