cocoa: update mouse coordinates when window is initialized.

Make MpvEventsView -signalMousePosition a public method so it can be
called without a compiler warning. Previously, the mouse position would
be reported as (0,0) until the cursor was moved.

video/out/cocoa/events_view.h

@@ -23,4 +23,5 @@
 - (void)setFullScreen:(BOOL)willBeFullscreen;
 - (void)clear;
 - (BOOL)canHideCursor;
+- (void)signalMousePosition;
 @end

video/out/cocoa/events_view.m

@@ -28,7 +28,6 @@
 @property(nonatomic, assign) BOOL clearing;
 @property(nonatomic, assign) BOOL hasMouseDown;
 @property(nonatomic, retain) NSTrackingArea *tracker;
-- (void)signalMousePosition;
 - (BOOL)hasDock:(NSScreen*)screen;
 - (BOOL)hasMenubar:(NSScreen*)screen;
 - (int)mpvButtonNumber:(NSEvent*)event;

video/out/cocoa_common.m

@@ -455,6 +455,8 @@ static void create_ui(struct vo *vo, struct mp_rect *win, int geo_flags)
     view.adapter = adapter;
     s->view = view;
     [parent addSubview:s->view];
+    // update the cursor position now that the view has been added.
+    [view signalMousePosition];
 
 #if HAVE_COCOA_APPLICATION
     cocoa_register_menu_item_action(MPM_H_SIZE,   @selector(halfSize));
@@ -572,7 +574,7 @@ int vo_cocoa_config_window(struct vo *vo, uint32_t flags, void *gl_ctx)
         }
 
         // trigger a resize -> don't set vo->dwidth and vo->dheight directly
-        // since this block is executed asynchrolously to the video
+        // since this block is executed asynchronously to the video
         // reconfiguration code.
         s->pending_events |= VO_EVENT_RESIZE;
     });