[chronojump] Shown error message of restart Chronojump if cannot recover from Chronopic disconnect

[Xavier de Blas <xaviblas src gnome org>]

commit fd5b12f574bb0f8a4bcb744d0e4b2ca935b104b4
Author: Xavier de Blas <xaviblas gmail com>
Date:   Fri Oct 16 19:09:32 2020 +0200

    Shown error message of restart Chronojump if cannot recover from Chronopic disconnect

 src/gui/app1/chronojump.cs | 7 +++++++
 1 file changed, 7 insertions(+)
---
diff --git a/src/gui/app1/chronojump.cs b/src/gui/app1/chronojump.cs
index 35270dc7..987d0369 100644
--- a/src/gui/app1/chronojump.cs
+++ b/src/gui/app1/chronojump.cs
@@ -3844,6 +3844,13 @@ public partial class ChronoJumpWindow
                bool canCaptureC = cp2016.StoredCanCaptureContacts;
                bool wireless = cp2016.StoredWireless;
 
+               if(canCaptureC && cp2016.CP == null)
+               {
+                       new DialogMessage(Constants.MessageTypes.WARNING,
+                                       "Problems connecting with Chronopic." + "\n\n" + "Please, restart 
Chronojump");
+                       return;
+               }
+
                /*
                 * We need to do this to ensure no cancel_clicked calls accumulate
                 * if we don't do tue -= now, after 10 tests, if we cancel last one,