fix errors from resource builder

resources/MANIFEST

@@ -2,4 +2,5 @@
 #
 # When you add a new resource, make sure to add it to this file.
 
+textures/area-lut.png
 textures/gamma-lut.png

resources/MANIFEST.gl4

@@ -32,4 +32,4 @@ shaders/gl4/demo_ground.vs.glsl
 shaders/gl4/reproject.fs.glsl
 shaders/gl4/reproject.vs.glsl
 shaders/gl4/stencil.fs.glsl
-shaders/gl4/stencil.vs.
+shaders/gl4/stencil.vs.glsl

resources/build.rs

@@ -49,7 +49,7 @@ fn main() {
     add_manifest("MANIFEST");
 
     for part in ["debug", "gl3", "gl4", "metal"] {
-        let key = format!("CARGO_FEATURE_{part}");
+        let key = format!("CARGO_FEATURE_{}", part.to_ascii_uppercase());
         if env::var(&key).is_ok() {
             add_manifest(&format!("MANIFEST.{part}"));
         }

resources/src/embedded.rs

@@ -28,7 +28,7 @@ impl ResourceLoader for EmbeddedResourceLoader {
     fn slurp(&self, virtual_path: &str) -> Result<Vec<u8>, IOError> {
         match RESOURCES.iter().filter(|&(path, _)| *path == virtual_path).next() {
             Some((_, data)) => Ok(data.to_vec()),
-            None => Err(IOError::from(ErrorKind::NotFound)),
+            None => Err(IOError::new(ErrorKind::NotFound, virtual_path)),
         }
     }
 }