X11: Flatten window model (#536)

src/lib.rs

@@ -374,6 +374,12 @@ pub enum MouseCursor {
     RowResize,
 }
 
+impl Default for MouseCursor {
+    fn default() -> Self {
+        MouseCursor::Default
+    }
+}
+
 /// Describes how winit handles the cursor.
 #[derive(Debug, Copy, Clone, PartialEq)]
 pub enum CursorState {
@@ -391,6 +397,12 @@ pub enum CursorState {
     Grab,
 }
 
+impl Default for CursorState {
+    fn default() -> Self {
+        CursorState::Normal
+    }
+}
+
 /// Attributes to use when creating a window.
 #[derive(Clone)]
 pub struct WindowAttributes {