Remove deadcode warning in BuilderAttribs

In src/lib.rs remove the deadcode warning about the 'headless' builder
attribute. Headless is /actually/ set to false or true depending on if
HeadlessRendererBuilder is used.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 436c0cf..f084296 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -154,6 +154,7 @@ pub struct WindowBuilder<'a> {
 
 /// Attributes
 struct BuilderAttribs<'a> {
+    #[allow(dead_code)]
     headless: bool,
     strict: bool,
     sharing: Option<&'a winimpl::Window>,