winemac: Constify some macdrv_event pointer parameters.

dlls/winemac.drv/event.c

@@ -111,7 +111,7 @@ static macdrv_event_mask get_event_mask(DWORD mask)
  *
  * Handler for QUERY_EVENT queries.
  */
-static void macdrv_query_event(HWND hwnd, macdrv_event *event)
+static void macdrv_query_event(HWND hwnd, const macdrv_event *event)
 {
     BOOL success = FALSE;
     macdrv_query *query = event->query_event.query;
@@ -148,7 +148,7 @@ static void macdrv_query_event(HWND hwnd, macdrv_event *event)
 /***********************************************************************
  *              macdrv_handle_event
  */
-void macdrv_handle_event(macdrv_event *event)
+void macdrv_handle_event(const macdrv_event *event)
 {
     HWND hwnd = macdrv_get_window_hwnd(event->window);
     const macdrv_event *prev;

dlls/winemac.drv/macdrv.h

@@ -142,7 +142,7 @@ extern struct window_surface *create_surface(macdrv_window window, const RECT *r
 extern void set_window_surface(macdrv_window window, struct window_surface *window_surface) DECLSPEC_HIDDEN;
 extern void set_surface_use_alpha(struct window_surface *window_surface, BOOL use_alpha) DECLSPEC_HIDDEN;
 
-extern void macdrv_handle_event(macdrv_event *event) DECLSPEC_HIDDEN;
+extern void macdrv_handle_event(const macdrv_event *event) DECLSPEC_HIDDEN;
 
 extern void macdrv_window_close_requested(HWND hwnd) DECLSPEC_HIDDEN;
 extern void macdrv_window_frame_changed(HWND hwnd, CGRect frame) DECLSPEC_HIDDEN;

dlls/winemac.drv/macdrv_cocoa.h

@@ -266,7 +266,7 @@ static inline macdrv_event_mask event_mask_for_type(int type)
     return ((macdrv_event_mask)1 << type);
 }
 
-typedef void (*macdrv_event_handler)(macdrv_event *event);
+typedef void (*macdrv_event_handler)(const macdrv_event *event);
 
 extern macdrv_event_queue macdrv_create_event_queue(macdrv_event_handler handler) DECLSPEC_HIDDEN;
 extern void macdrv_destroy_event_queue(macdrv_event_queue queue) DECLSPEC_HIDDEN;