macosx/MainWindow: modernize getter

modules/gui/macosx/MainWindow.h

@@ -146,6 +146,7 @@
     id o_current_video_window;
 }
 + (VLCMainWindow *)sharedInstance;
+@property (readonly) BOOL fullscreen;
 
 - (IBAction)play:(id)sender;
 - (IBAction)prev:(id)sender;
@@ -165,7 +166,7 @@
 - (IBAction)dropzoneButtonAction:(id)sender;
 
 - (void)setTitle:(NSString *)title;
-- (void) customZoom:(id)sender;
+- (void)customZoom:(id)sender;
 - (void)windowResizedOrMoved:(NSNotification *)notification;
 
 - (void)showDropZone;
@@ -198,7 +199,6 @@
 
 /* fullscreen handling */
 - (void)showFullscreenController;
-- (BOOL)isFullscreen;
 - (void)lockFullscreenAnimation;
 - (void)unlockFullscreenAnimation;
 - (void)enterFullscreen;

modules/gui/macosx/MainWindow.m

@@ -2043,7 +2043,7 @@ static VLCMainWindow *_o_sharedInstance = nil;
         [o_fspanel fadeIn];
 }
 
-- (BOOL)isFullscreen
+- (BOOL)fullscreen
 {
     return b_fullscreen;
 }

modules/gui/macosx/VideoView.m

@@ -268,7 +268,7 @@ int DeviceCallback( vlc_object_t *p_this, const char *psz_variable,
     // This is the result of [NSEvent standardMagnificationThreshold].
     // Unfortunately, this is a private API, currently.
     CGFloat f_threshold = 0.3;
-    BOOL b_fullscreen = [[VLCMainWindow sharedInstance] isFullscreen];
+    BOOL b_fullscreen = [[VLCMainWindow sharedInstance] fullscreen];
 
     if( ( f_cumulated_magnification > f_threshold && !b_fullscreen ) || ( f_cumulated_magnification < -f_threshold && b_fullscreen ) )
     {