Fixed Rusttype Font ownership issues

src/main.rs

@@ -26,7 +26,7 @@ mod vesseldata;
 use vesseldata::VesselDataEventSource;
 
 pub struct HelmsDisplay {
-  font: Box<Font<'static>>,
+  font: Font<'static>,
   boat: forms::Form,
   compassrose: forms::Form,
   cog: forms::Form,
@@ -46,8 +46,7 @@ impl HelmsDisplay {
     let compassrose = loader.load_form("compass-rose.svg").unwrap();
     let cog = loader.load_form("cog.svg").unwrap();
     let wind = loader.load_form("wind.svg").unwrap();
-    let f = loader.load_font("font.ttf").unwrap();
-    let font = Box::new(f);
+    let font = loader.load_font("font.ttf").unwrap();
 
     HelmsDisplay {
       font: font,