[chronojump] missing in last commit

[Xavier de Blas <xaviblas src gnome org>]

commit 2442d0df529f03563f08cb4994df9ba58acf54b6
Author: Xavier de Blas <xaviblas gmail com>
Date:   Fri Sep 20 18:21:17 2019 +0200

    missing in last commit

 src/gui/forceSensor.cs | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/gui/forceSensor.cs b/src/gui/forceSensor.cs
index a56b5a96..d1f5a6d9 100644
--- a/src/gui/forceSensor.cs
+++ b/src/gui/forceSensor.cs
@@ -28,6 +28,7 @@ using Glade;
 using System.Text; //StringBuilder
 using System.Collections;
 using System.Collections.Generic; //List<T>
+using System.Text.RegularExpressions; //Regex
 using Mono.Unix;
 
 //struct with relevant data used on various functions and threads