Merge pull request #112 from DavidPartouche/cocoa_fix

Fixed an issue with the updated rust-cocoa crate

src/osx/event.rs

@@ -1,6 +1,4 @@
 use events;
-use cocoa::base::NSUInteger;
-use cocoa::appkit;
 
 pub fn vkeycode_to_element(code: u16) -> Option<events::VirtualKeyCode> {
     Some(match code {

src/osx/mod.rs

@@ -113,7 +113,10 @@ impl Window {
     fn create_window(dimensions: (uint, uint), title: &str, monitor: Option<MonitorID>) -> Option<id> {
         unsafe {
             let scr_frame = match monitor {
-                Some(_) => NSScreen::mainScreen(nil).frame(),
+                Some(_) => {
+                    let screen = NSScreen::mainScreen(nil);
+                    NSScreen::frame(screen)
+                }
                 None    => {
                     let (width, height) = dimensions;
                     NSRect::new(NSPoint::new(0., 0.), NSSize::new(width as f64, height as f64))