[hyena] Missing double? support bits

[Gabriel Burt <gburt src gnome org>]

commit 3c753c127013af6c21a8e698901d4a23c9ab3304
Author: Mike Gemünde <mike gemuende de>
Date:   Sat Apr 24 17:11:31 2010 +0200

    Missing double? support bits

 .../Hyena.Data.Sqlite/SqliteUtils.cs               |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/src/Hyena.Data.Sqlite/Hyena.Data.Sqlite/SqliteUtils.cs b/src/Hyena.Data.Sqlite/Hyena.Data.Sqlite/SqliteUtils.cs
index a2e1e83..979ccb3 100644
--- a/src/Hyena.Data.Sqlite/Hyena.Data.Sqlite/SqliteUtils.cs
+++ b/src/Hyena.Data.Sqlite/Hyena.Data.Sqlite/SqliteUtils.cs
@@ -105,6 +105,12 @@ namespace Hyena.Data.Sqlite
                 return Enum.ToObject (type, value);
             } else if (type == typeof (bool)) {
                 return ((long)value == 1);
+            } else if (type == typeof (double?)) {
+                if (value == null)
+                    return null;
+
+                double double_value = ((Single?) value).Value;
+                return (double?) double_value;
             } else {
                 return Convert.ChangeType (value, type);
             }