Reduced the number of explicit retain/release method calls on love objects. Less chance of bugs!

src/modules/graphics/opengl/Image.h

@@ -156,11 +156,11 @@ private:
 
 	// The ImageData from which the texture is created. May be null if
 	// Compressed image data was used to create the texture.
-	love::image::ImageData *data;
+	Object::StrongRef<love::image::ImageData> data;
 
 	// Or the Compressed Image Data from which the texture is created. May be
 	// null if raw ImageData was used to create the texture.
-	love::image::CompressedData *cdata;
+	Object::StrongRef<love::image::CompressedData> cdata;
 
 	// Real dimensions of the texture, if it was auto-padded to POT size.
 	int paddedWidth, paddedHeight;