From a8db21319f2210d81e31964c7cd5fc91e87f884b Mon Sep 17 00:00:00 2001
From: Maciej Suminski <maciej.suminski@cern.ch>
Date: Mon, 28 May 2018 16:41:12 +0200
Subject: [PATCH] Spice Simulator: set correct scale for constant plots

Fixes: lp:1772278
* https://bugs.launchpad.net/kicad/+bug/1772278
---
 include/widgets/mathplot.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/widgets/mathplot.h b/include/widgets/mathplot.h
index 256522326e..2b7de65c41 100644
--- a/include/widgets/mathplot.h
+++ b/include/widgets/mathplot.h
@@ -748,8 +748,8 @@ public:
 
         if( m_minV == m_maxV )
         {
-            m_minV  = -1.0;
-            m_maxV  = 1.0;
+            m_minV = m_minV - 1.0;
+            m_maxV = m_maxV + 1.0;
         }
     }