[dconf-editor] Privatize some GSettingsKey properties getters.

[Arnaud Bonatti <arnaudb src gnome org>]

commit 25de035ef3f2facd1e4a97cd6c6b014dd57577f3
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Mon Dec 4 02:29:56 2017 +0100

    Privatize some GSettingsKey properties getters.

 editor/dconf-model.vala |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/editor/dconf-model.vala b/editor/dconf-model.vala
index d61f02b..f23b726 100644
--- a/editor/dconf-model.vala
+++ b/editor/dconf-model.vala
@@ -483,8 +483,8 @@ public class DConfKey : Key
 
 public class GSettingsKey : Key
 {
-    public string schema_id              { get; construct; }
-    public string? schema_path           { get; construct; }
+    public string schema_id      { private get; construct; }
+    public string? schema_path   { private get; construct; }
     public string summary                { get; construct; }
     public string description    { private get; construct; }
     public Variant default_value         { get; construct; }