only use download folder if exists

Cargo.lock

@@ -613,7 +613,7 @@ dependencies = [
 
 [[package]]
 name = "tf-asset-loader"
-version = "0.1.4"
+version = "0.1.5"
 dependencies = [
  "steamlocate",
  "thiserror",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "tf-asset-loader"
-version = "0.1.4"
+version = "0.1.5"
 edition = "2021"
 license = "MIT"
 description = "Utility for loading assets from tf2 data files"

src/lib.rs

@@ -63,10 +63,13 @@ impl Loader {
         #[allow(unused_mut)]
         let mut sources = vec![
             Arc::new(tf_dir) as Arc<dyn AssetSource + Send + Sync>,
-            Arc::new(download),
             Arc::new(hl_dir),
         ];
 
+        if download.exists() {
+            sources.push(Arc::new(download));
+        }
+
         #[cfg(feature = "vpk")]
         sources.extend(vpks);