From f6fb0fe96f2a242a20a9655b8373c22df3fad33c Mon Sep 17 00:00:00 2001
From: Alexander Yakovlev <keloero@oreolek.ru>
Date: Mon, 28 Mar 2016 11:17:28 +0700
Subject: [PATCH] goBack() now returns to start if it's too early to tell.

---
 lib/salet.coffee | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/salet.coffee b/lib/salet.coffee
index d5a847b..72c7a70 100644
--- a/lib/salet.coffee
+++ b/lib/salet.coffee
@@ -304,7 +304,11 @@ class Salet
     # Go back N rooms. It's not an UNDO.
     # Also, steps = 1 is the current room
     @goBack = (steps = 2) =>
-      @processClick(@progress.path[@progress.path.length - steps])
+      if @progress.path.length > steps
+        location = @progress.path[@progress.path.length - steps]
+      else
+        location = @start
+      @processClick(location)
 
     # Transition between rooms.
     @doTransitionTo = (newRoomId) =>