[chronojump] Fix to last commit

[Xavier de Blas <xaviblas src gnome org>]

commit f242d1106ba2df632c2a3ab3aac47ea719e06d02
Author: Xavier de Blas <xaviblas gmail com>
Date:   Thu Jan 30 16:18:21 2020 +0100

    Fix to last commit

 src/gui/app1/chronojump.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/gui/app1/chronojump.cs b/src/gui/app1/chronojump.cs
index 1600cfa1..25b6dda8 100644
--- a/src/gui/app1/chronojump.cs
+++ b/src/gui/app1/chronojump.cs
@@ -7572,7 +7572,7 @@ LogB.Debug("mc finished 5");
 
                List<ChronopicRegisterPort> l = SqliteChronopicRegister.SelectAll (false);
                foreach(ChronopicRegisterPort crp in l)
-                       if(crp.Type == ChronopicRegisterPort.Types.ENCODER)
+                       if(crp.Type == ChronopicRegisterPort.Types.ENCODER && crp.Port != "")
                                notebook_start.CurrentPage = 1;
        }