[chronojump] Fixes to not crash if no jump types

[Xavier de Blas <xaviblas src gnome org>]

commit e8faa036a8f6a60f0835c5423a077da8920857d5
Author: Xavier de Blas <xaviblas gmail com>
Date:   Tue Aug 2 14:56:47 2022 +0200

    Fixes to not crash if no jump types

 src/gui/app1/chronojump.cs | 5 +++--
 src/gui/app1/jump.cs       | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/src/gui/app1/chronojump.cs b/src/gui/app1/chronojump.cs
index 486e74cb8..baacc6325 100644
--- a/src/gui/app1/chronojump.cs
+++ b/src/gui/app1/chronojump.cs
@@ -1396,8 +1396,9 @@ public partial class ChronoJumpWindow
                        if(! configChronojump.Exhibition)
                                updateGraphJumpsSimple();
 
-                       update_label_extra_window_jumps_radiobutton_weight_percent_as_kg(
-                                       (currentJumpType.HasWeight && 
extra_window_jumps_radiobutton_weight.Active));
+                       if(currentJumpType != null)
+                               update_label_extra_window_jumps_radiobutton_weight_percent_as_kg(
+                                               (currentJumpType.HasWeight && 
extra_window_jumps_radiobutton_weight.Active));
 
                        if(notebook_analyze.CurrentPage == 
Convert.ToInt32(notebook_analyze_pages.JUMPSPROFILE))
                                jumpsProfileDo(true); //calculate data
diff --git a/src/gui/app1/jump.cs b/src/gui/app1/jump.cs
index 63d5f5083..34c35bd9b 100644
--- a/src/gui/app1/jump.cs
+++ b/src/gui/app1/jump.cs
@@ -307,7 +307,7 @@ public partial class ChronoJumpWindow
        private void updateGraphJumpsSimple () 
        {
                LogB.Information("Called updateGraphJumpsSimple");
-               if(currentPerson == null || currentSession == null)
+               if(currentPerson == null || currentSession == null || currentJumpType == null) 
//currentJumpType needed if there are no jumpTypes
                        return;
 
                double tc = 0.0;