[gnome-tetravex] Do not create fundamental types

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 0c14045aed4437b4609c76d7f9024b881f5bbe1b
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Tue Jun 24 08:47:47 2014 -0500

    Do not create fundamental types

 src/history.vala     |    4 ++--
 src/puzzle-view.vala |    2 +-
 src/puzzle.vala      |    4 ++--
 src/theme.vala       |    2 +-
 4 files changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/src/history.vala b/src/history.vala
index 72effe6..51862f3 100644
--- a/src/history.vala
+++ b/src/history.vala
@@ -9,7 +9,7 @@
  * license.
  */
 
-public class History
+public class History : Object
 {
     public string filename;
     public List<HistoryEntry> entries;
@@ -98,7 +98,7 @@ public class History
     }
 }
 
-public class HistoryEntry
+public class HistoryEntry : Object
 {
     public DateTime date;
     public uint size;
diff --git a/src/puzzle-view.vala b/src/puzzle-view.vala
index 822c811..7f98895 100644
--- a/src/puzzle-view.vala
+++ b/src/puzzle-view.vala
@@ -9,7 +9,7 @@
  * license.
  */
 
-private class TileImage
+private class TileImage : Object
 {
     /* Tile being moved */
     public Tile tile;
diff --git a/src/puzzle.vala b/src/puzzle.vala
index f1b4185..2365cce 100644
--- a/src/puzzle.vala
+++ b/src/puzzle.vala
@@ -9,7 +9,7 @@
  * license.
  */
 
-public class Tile
+public class Tile : Object
 {
     /* Edge colors */
     public int north;
@@ -28,7 +28,7 @@ public class Tile
     }
 }
 
-public class Puzzle
+public class Puzzle : Object
 {
     private uint _size;
     public uint size
diff --git a/src/theme.vala b/src/theme.vala
index 5877371..3a665ec 100644
--- a/src/theme.vala
+++ b/src/theme.vala
@@ -9,7 +9,7 @@
  * license.
  */
 
-public class Theme
+public class Theme : Object
 {
     /* Colors of tiles and text */
     private Cairo.Pattern tile_colors[10];