add a IAssetProvider.CommitAssets() call to the grid asset server, when a asset is uploaded to it. Don't think the MySql provider needs this call but the Sql provider does else the assets don't get written out to the database file.

OpenSim/Grid/AssetServer/RestService.cs

@@ -96,6 +96,7 @@ namespace OpenSim.Grid.AssetServer
 
             MainLog.Instance.Verbose("REST", "StoreAndCommitAsset {0}", asset.FullID);
             m_assetProvider.CreateAsset(asset);
+            m_assetProvider.CommitAssets();
 
             return new byte[] {};
         }