[chronojump] Fixed decimals in speed in encoder capture plot

[Xavier de Blas <xaviblas src gnome org>]

commit 7b4b3ef8d6667e7e154466cc3da63923aa0579a8
Author: Xavier de Blas <xaviblas gmail com>
Date:   Thu Apr 3 12:24:55 2014 +0200

    Fixed decimals in speed in encoder capture plot

 src/gui/encoder.cs |   11 ++++++-----
 1 files changed, 6 insertions(+), 5 deletions(-)
---
diff --git a/src/gui/encoder.cs b/src/gui/encoder.cs
index 0fc4bc3..26381ac 100644
--- a/src/gui/encoder.cs
+++ b/src/gui/encoder.cs
@@ -3792,14 +3792,15 @@ Log.WriteLine(str);
                int left_margin = 10;
                int right_margin = 0;
                int vert_margin = 35;
-               
+       
+               string title = "";      
                //plot title    
                if(mainVariable == Constants.MeanSpeed || mainVariable == Constants.MaxSpeed)
-                       mainVariable = mainVariable += " (m/s)";
+                       title = mainVariable + " (m/s)";
                else //powers
-                       mainVariable = mainVariable += " (W)";
+                       title = mainVariable + " (W)";
                        
-               layout_encoder_capture_curves_bars.SetMarkup(mainVariable);
+               layout_encoder_capture_curves_bars.SetMarkup(title);
                textWidth = 1;
                textHeight = 1;
                layout_encoder_capture_curves_bars.GetPixelSize(out textWidth, out textHeight); 
@@ -3859,7 +3860,7 @@ Log.WriteLine(str);
                        Rectangle rect = new Rectangle(dLeft, dHeight, dWidth, graphHeight);
                        encoder_capture_curves_bars_pixmap.DrawRectangle(my_pen, true, rect);
                        encoder_capture_curves_bars_pixmap.DrawRectangle(pen_black_encoder_capture, false, 
rect);
-               
+       
                        if(mainVariable == Constants.MeanSpeed || mainVariable == Constants.MaxSpeed)
                                layout_encoder_capture_curves_bars.SetMarkup(Util.TrimDecimals(d,2));
                        else //powers