Throw an exception if a referenced external image is not found

diff --git a/source/texture2darray.cpp b/source/texture2darray.cpp
index 4123f0e2906e261b64fe0227c27894a00f8c7a09..1a085ed8e73bbe6c89c5361b7839a5fe32180c32 100644 (file)
--- a/source/texture2darray.cpp
+++ b/source/texture2darray.cpp
@@ -64,6 +64,8 @@ void Texture2DArray::Loader::external_image(unsigned z, const string &fn)
 {
        Graphics::Image img;
        RefPtr<IO::Seekable> io = get_collection().open_raw(fn);
+       if(!io)
+               throw IO::file_not_found(fn);
        img.load_io(*io);
 
        obj.layer_image(0, z, img);