From 0241617713554e83ed21942eeaa7f213f9318625 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marco=20Trevisan=20=28Trevi=C3=B1o=29?= <mail@3v1n0.net>
Date: Fri, 22 Nov 2019 18:03:08 +0100
Subject: [PATCH] fpi-ssm: Also bug-on negative state value

Being an integer, anything could happen.
---
 libfprint/fpi-ssm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libfprint/fpi-ssm.c b/libfprint/fpi-ssm.c
index 5367e32..5299e2d 100644
--- a/libfprint/fpi-ssm.c
+++ b/libfprint/fpi-ssm.c
@@ -317,7 +317,7 @@ void
 fpi_ssm_jump_to_state (FpiSsm *machine, int state)
 {
   BUG_ON (machine->completed);
-  BUG_ON (state >= machine->nr_states);
+  BUG_ON (state < 0 || state >= machine->nr_states);
   machine->cur_state = state;
   __ssm_call_handler (machine);
 }