Fix compiler error in code generated for GLSL struct (#1166)

CHANGELOG_VULKANO.md

@@ -4,6 +4,7 @@
   files.
 - Add a `union` method for the extensions types.
 - Make `BufferUsage` derive `PartialEq` and `Eq`
+- Fix a compiler error in struct code generated by the `shader!` macro.
 
 # Version 0.11.1 (2018-11-16)
 

vulkano-shaders/src/structs.rs

@@ -135,7 +135,7 @@ fn write_struct(doc: &Spirv, struct_id: u32, members: &[u32]) -> (TokenStream, O
         if diff >= 1 {
             rust_members.push(Member {
                 name: Ident::new(&format!("_dummy{}", next_padding_num), Span::call_site()),
-                ty: quote!{ [u8; {}] },
+                ty: quote!{ [u8; #diff as usize] },
             });
         }
     }