[chronojump] JumpsRjFatigue graph gets blank if no data

[Xavier de Blas <xaviblas src gnome org>]

commit aab13b162632760181fe99f1c92f1862e6b8b20a
Author: Xavier de Blas <xaviblas gmail com>
Date:   Mon Aug 17 17:29:27 2020 +0100

    JumpsRjFatigue graph gets blank if no data

 src/gui/app1/jumpsRjFatigue.cs | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/src/gui/app1/jumpsRjFatigue.cs b/src/gui/app1/jumpsRjFatigue.cs
index 53f46a92..8e2b37cc 100644
--- a/src/gui/app1/jumpsRjFatigue.cs
+++ b/src/gui/app1/jumpsRjFatigue.cs
@@ -145,6 +145,9 @@ public partial class ChronoJumpWindow
                                drawingarea_jumps_rj_fatigue == null || 
drawingarea_jumps_rj_fatigue.GdkWindow == null || //it happens at start on click on analyze
                                comboSelectJumpsRjFatigueNum.GetSelectedId() < 0)
                {
+                       if(drawingarea_jumps_rj_fatigue != null && drawingarea_jumps_rj_fatigue.GdkWindow != 
null)
+                               new JumpsRjFatigueGraph(drawingarea_jumps_rj_fatigue, "");
+
                        button_jumps_rj_fatigue_save_image.Sensitive = false;
                        return;
                }