From 9427e8dd16201b11877454a8ee7331ef89a80a70 Mon Sep 17 00:00:00 2001
From: Matt Spraggs <matthew.spraggs@gmail.com>
Date: Thu, 12 Nov 2015 13:14:44 +0000
Subject: [PATCH] TabFunction: Fixed bug in quadratic interpolation

---
 lib/TabFunction.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/TabFunction.cpp b/lib/TabFunction.cpp
index a980f57..4ea29ad 100644
--- a/lib/TabFunction.cpp
+++ b/lib/TabFunction.cpp
@@ -97,7 +97,7 @@ double TabFunction::operator()(const double *arg) const
             if (it == value_.begin()) {
                 it = next(it);
             }
-            else if (it == value_.end()) {
+            else if (it == prev(value_.end())) {
                 it = prev(it);
             }
             xs[0] = prev(it)->first;