[folks] Check the GLib.Type of both elements for AbstractFieldDetails.equal()

[Travis Reitter <treitter src gnome org>]

commit f9af4cbcb3a378bc375f406ff0336f293bd2bf92
Author: Travis Reitter <travis reitter collabora co uk>
Date:   Fri Oct 21 15:54:07 2011 -0700

    Check the GLib.Type of both elements for AbstractFieldDetails.equal()
    
    This simplifies the code for overridden equal() functions.

 folks/abstract-field-details.vala |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/folks/abstract-field-details.vala b/folks/abstract-field-details.vala
index f54670a..960406a 100644
--- a/folks/abstract-field-details.vala
+++ b/folks/abstract-field-details.vala
@@ -254,7 +254,9 @@ public abstract class Folks.AbstractFieldDetails<T> : Object
    */
   public virtual bool equal (AbstractFieldDetails<T> that)
     {
-      return this.values_equal<T> (that) && this.parameters_equal<T> (that);
+      return (this.get_type () == that.get_type ()) &&
+        this.values_equal<T> (that) &&
+        this.parameters_equal<T> (that);
     }
 
   /**