macosx: fix white fullscreen when video ended(close #6288)

Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>
(cherry picked from commit be40ef554ab4d76d5ff221567940d0d4d5e3aa65)

modules/gui/macosx/MainWindow.h

@@ -158,6 +158,7 @@
 - (void)drawFancyGradientEffectForTimeSlider;
 
 - (id)videoView;
+- (id)setupVideoView;
 - (void)setVideoplayEnabled;
 - (void)resizeWindow;
 - (void)setNativeVideoSize:(NSSize)size;

modules/gui/macosx/MainWindow.m

@@ -1273,8 +1273,12 @@ static VLCMainWindow *_o_sharedInstance = nil;
 
 #pragma mark -
 #pragma mark Video Output handling
-
 - (id)videoView
+{
+    return o_video_view;
+}
+
+- (id)setupVideoView
 {
     vout_thread_t *p_vout = getVout();
     if (config_GetInt( VLCIntf, "embedded-video" ))

modules/gui/macosx/intf.m

@@ -1642,7 +1642,7 @@ unsigned int CocoaKeyToVLC( unichar i_key )
 
 - (id)getVideoViewAtPositionX: (int *)pi_x Y: (int *)pi_y withWidth: (unsigned int*)pi_width andHeight: (unsigned int*)pi_height
 {
-    id videoView = [o_mainwindow videoView];
+    id videoView = [o_mainwindow setupVideoView];
     NSRect videoRect = [videoView frame];
     int i_x = (int)videoRect.origin.x;
     int i_y = (int)videoRect.origin.y;