[chronojump] Solved crash if mass == 0

[Xavier de Blas <xaviblas src gnome org>]

commit e82313f07c3f8bfeff25e0509e578883fe51629a
Author: Xavier de Blas <xaviblas gmail com>
Date:   Mon Mar 10 18:03:42 2014 +0100

    Solved crash if mass == 0

 src/gui/encoder.cs |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/src/gui/encoder.cs b/src/gui/encoder.cs
index b728218..1211050 100644
--- a/src/gui/encoder.cs
+++ b/src/gui/encoder.cs
@@ -4241,7 +4241,10 @@ Log.WriteLine(str);
                foreach(double d in data)
                        if(d < min)
                                min = d;
-               
+       
+               if(max == 0)
+                       return; 
+
                int textWidth = 1;
                int textHeight = 1;