[chronojump] Fixed crash on forceSensor when exercise is elastic but raw data

[Xavier de Blas <xaviblas src gnome org>]

commit 4f30395fe7f86918d1b4f47f42b8682dcb7064bd
Author: Xavier de Blas <xaviblas gmail com>
Date:   Thu Feb 20 13:34:42 2020 +0100

    Fixed crash on forceSensor when exercise is elastic but raw data

 src/gui/app1/forceSensor.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/gui/app1/forceSensor.cs b/src/gui/app1/forceSensor.cs
index feb9a2aa..011638da 100644
--- a/src/gui/app1/forceSensor.cs
+++ b/src/gui/app1/forceSensor.cs
@@ -1868,7 +1868,8 @@ LogB.Information(" fs R ");
                        }
                }
                ForceSensorDynamics fsd;
-               if(currentForceSensorExercise.Elastic)
+
+               if(currentForceSensorExercise.ComputeAsElastic)
                        fsd = new ForceSensorDynamicsElastic(
                                        times, forces, fsco, currentForceSensorExercise, 
currentPersonSession.Weight, currentForceSensor.Stiffness,
                                        preferences.forceSensorElasticEccMinDispl, 
preferences.forceSensorElasticConMinDispl);