MT#55283 prevent pointless push to log_info_stack

If there's no log_info currently set, don't push an empty element.

Change-Id: I6f10c7b066eb18237beeb0054ac59f353a34fe22

daemon/log_funcs.h

@@ -28,6 +28,8 @@ INLINE void __log_info_release(struct log_info *li) {
 	}
 }
 INLINE void __log_info_push(void) {
+	if (log_info.e == LOG_INFO_NONE)
+		return;
 	struct log_info *copy = g_slice_alloc(sizeof(*copy));
 	*copy = log_info;
 	log_info_stack = g_slist_prepend(log_info_stack, copy);