[chronojump] cairoXY was not plotting xy graphs since last two commits. Fixed.

[Xavier de Blas <xaviblas src gnome org>]

commit d7045be7287a39b7e198006a7aa8ad3ddd3a8e8f
Author: Xavier de Blas <xaviblas gmail com>
Date:   Thu Mar 17 09:43:45 2022 +0100

    cairoXY was not plotting xy graphs since last two commits. Fixed.

 src/gui/cairo/xy.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/gui/cairo/xy.cs b/src/gui/cairo/xy.cs
index 988720a37..783dfe359 100644
--- a/src/gui/cairo/xy.cs
+++ b/src/gui/cairo/xy.cs
@@ -459,7 +459,7 @@ public abstract class CairoXY : CairoGeneric
                                } else
                                        g.LineTo(xgraph, ygraph);
                        }
-                       //g.Stroke (); TODO: reactivate after benchmark
+                       g.Stroke ();
                }
 
 //             lock (point_l) {