[chronojump] Fix on encoderCaptureMainVariable SQL Update since last commits

[Xavier de Blas <xaviblas src gnome org>]

commit d28473f9c5582f2353eb49f4f99ea5f1f8c7e129
Author: Xavier de Blas <xaviblas gmail com>
Date:   Fri Mar 9 17:45:01 2018 +0100

    Fix on encoderCaptureMainVariable SQL Update since last commits

 src/gui/chronojump.cs |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gui/chronojump.cs b/src/gui/chronojump.cs
index b90e588..434d78a 100644
--- a/src/gui/chronojump.cs
+++ b/src/gui/chronojump.cs
@@ -6876,7 +6876,7 @@ LogB.Debug("X");
                        Constants.EncoderVariablesCapture mainVariable = Constants.SetEncoderVariablesCapture(
                                        repetitiveConditionsWin.GetMainVariable);
                        if( preferences.encoderCaptureMainVariable != mainVariable ) {
-                               SqlitePreferences.Update("encoderCaptureMainVariable", 
Constants.GetEncoderVariablesCapture(mainVariable), false);
+                               SqlitePreferences.Update("encoderCaptureMainVariable", 
mainVariable.ToString(), false);
                                preferences.encoderCaptureMainVariable = mainVariable;
                        }
                        string mainVariableStr = Constants.GetEncoderVariablesCapture(mainVariable);