[chronojump] Added more Cairo disposed objects from last commits

[Xavier de Blas <xaviblas src gnome org>]

commit 311a1bdec170c3ec0f34496e80806fbb98d1ba01
Author: Xavier de Blas <xaviblas gmail com>
Date:   Tue Mar 15 10:20:50 2022 +0100

    Added more Cairo disposed objects from last commits

 src/gui/cairo/generic.cs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/src/gui/cairo/generic.cs b/src/gui/cairo/generic.cs
index 1bf867284..aea47e7b1 100644
--- a/src/gui/cairo/generic.cs
+++ b/src/gui/cairo/generic.cs
@@ -61,9 +61,11 @@ public abstract class CairoGeneric
                        {
                                gArea.SetSource (surface);
                                gArea.Paint ();
-                       }
 
-                       surface.Dispose();
+                               surface.Dispose();
+                               gArea.GetTarget().Dispose ();
+                               gArea.Dispose ();
+                       }
                }
 
                g.GetTarget().Dispose ();