[chronojump] Fixed DeletingLastTc on ending an Rj jump (fixes crash on unlimited with 1 jump)

[Xavier de Blas <xaviblas src gnome org>]

commit 85cb0465d17a871678522d043e62efab3bf8c291
Author: Xavier de Blas <xaviblas gmail com>
Date:   Wed Jun 2 17:35:43 2021 +0200

    Fixed DeletingLastTc on ending an Rj jump (fixes crash on unlimited with 1 jump)

 src/util.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/util.cs b/src/util.cs
index 5ca959e98..a3426b280 100644
--- a/src/util.cs
+++ b/src/util.cs
@@ -591,7 +591,7 @@ public class Util
 
                if(tcFull.Length > tvFull.Length) {
                        int lastEqualPos = tcString.LastIndexOf('=');
-                       return tcString.Substring(0, lastEqualPos -1);
+                       return tcString.Substring(0, lastEqualPos);
                } else {
                        return tcString;
                }