- MapView now requires to setMapDatabase(MapOptions) explicitly

- pass MapOptions when opening MapDatabase

src/org/oscim/renderer/TileGenerator.java

@@ -478,6 +478,9 @@ public class TileGenerator implements IRenderCallback, IMapDatabaseCallback {
 	private String mMapProjection;
 
 	public void setMapDatabase(IMapDatabase mapDatabase) {
+		if (mMapDatabase != null)
+			mMapDatabase.close();
+
 		mMapDatabase = mapDatabase;
 		mMapProjection = mMapDatabase.getMapProjection();
 	}