From a4f22b4d8c856150616dc3ef1ffb73156b2857fb Mon Sep 17 00:00:00 2001
From: Mark Liversedge <liversedge@gmail.com>
Date: Mon, 28 Apr 2014 20:12:07 +0100
Subject: [PATCH] Fix cp2-20 to not use t0 !

---
 src/CPPlot.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/CPPlot.cpp b/src/CPPlot.cpp
index 89adcb363..f3ff2c40d 100644
--- a/src/CPPlot.cpp
+++ b/src/CPPlot.cpp
@@ -413,6 +413,9 @@ CPPlot::plotModel()
                 // ooopsie no model for us!
                 if (cp == 0 && tau == 0 && t0 == 0) return;
 
+                // clear t0 if doing a classic 2 point curve
+                if (model == 1) t0 = 0;
+
                 // populate curve data with a CP curve
                 const int curve_points = 100;
                 double tmin = model == 2 ? 1.00/60.00 : tau; // we want to see the entire curve for 3 model