[chronojump] Encoder: Signal is saved only if it's ok

[Xavier de Blas <xaviblas src gnome org>]

commit cd1106c90905863f80f5845873314f7f2b869fe5
Author: Xavier de Blas <xaviblas gmail com>
Date:   Sun Nov 18 19:21:11 2012 +0100

    Encoder: Signal is saved only if it's ok

 src/gui/encoder.cs |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/src/gui/encoder.cs b/src/gui/encoder.cs
index 49cba44..fa32935 100644
--- a/src/gui/encoder.cs
+++ b/src/gui/encoder.cs
@@ -585,9 +585,15 @@ public partial class ChronoJumpWindow
 		} else if(mode == "allCurves") {
 			signalOrCurve = "curve";
 			feedback = Catalog.GetString("All curves saved");
-		} else 	//mode == "signal"
+		} else 	{	//mode == "signal"
 			signalOrCurve = "signal";
 		
+			//check if data is ok (maybe encoder was not connected, then don't save this signal)
+			EncoderCurve curve = treeviewEncoderCurvesGetCurve(1, false);
+			if(curve.N == null)
+				return "";
+		}
+		
 		string desc = "";
 		if(mode == "curve" || mode == "allCurves") {
 			EncoderCurve curve = treeviewEncoderCurvesGetCurve(selectedID,true);