Apply cargo clippy

src/main.rs

@@ -235,12 +235,11 @@ fn main() {
 
         // polling and handling the events received by the window
         for event in events {
-            match event {
-                glutin::event::Event::WindowEvent { event, .. } => match event {
+            if let glutin::event::Event::WindowEvent { event, .. } = event {
+                match event {
                     glutin::event::WindowEvent::CloseRequested => action = support::Action::Stop,
-                    ev => camera.process_input(&ev),
-                },
-                _ => (),
+                    ev => camera.process_input(ev),
+                }
             }
         }