[chronojump/michrolab] Fixed a crash on runsEvolution since recent commits

[Xavier Padullés <xpadulles src gnome org>]

commit 1a116a0d0a1f312a40cdfb32fa47b78febdf0a1a
Author: Xavier de Blas <xaviblas gmail com>
Date:   Wed Oct 5 16:42:14 2022 +0200

    Fixed a crash on runsEvolution since recent commits

 src/jumpsRunsEvolution.cs | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/jumpsRunsEvolution.cs b/src/jumpsRunsEvolution.cs
index d0f928aec..c341f68e3 100644
--- a/src/jumpsRunsEvolution.cs
+++ b/src/jumpsRunsEvolution.cs
@@ -138,6 +138,7 @@ public class RunsEvolution : JumpsRunsEvolution
                //2 convert to list of PointF, and also create distance_l
                point_l = new List<PointF>();
                distance_l = new List<string>();
+               dates_l = new List<DateTime>();
                int currentSession = -1;
                 foreach(Run r in run_l)
                {