[chronojump] Fixed minor glitch on last commit

[Xavier de Blas <xaviblas src gnome org>]

commit ab33cd3091dc569967378f2bb205c29e71322631
Author: Xavier de Blas <xaviblas gmail com>
Date:   Fri Jun 15 19:41:19 2018 +0200

    Fixed minor glitch on last commit

 src/gui/forceSensorAnalyze.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/gui/forceSensorAnalyze.cs b/src/gui/forceSensorAnalyze.cs
index d44b0dd4..2f58c890 100644
--- a/src/gui/forceSensorAnalyze.cs
+++ b/src/gui/forceSensorAnalyze.cs
@@ -530,6 +530,7 @@ public partial class ChronoJumpWindow
                */
                hscale_force_sensor_ai_a.Value = 1;
                hscale_force_sensor_ai_b.Value = 1;
+               force_sensor_last_ab = 1;
 
                forceSensorAIPlot();
 
@@ -934,7 +935,7 @@ public partial class ChronoJumpWindow
                forceSensorAIChanged = true;
                force_sensor_ai_drawingarea.QueueDraw(); //will fire ExposeEvent
        }
-       int force_sensor_last_ab = 0;
+       int force_sensor_last_ab = 1;
        private void on_hscale_force_sensor_ai_ab_value_changed (object o, EventArgs args)
        {
                if(fsAI == null || fsAI.GetLength() == 0)