wayland: Don't store wl_output pointers in mode driver data

They aren't used for anything, and cause problems if the video core tries to free them.

Manual backport of f9ba0e1

(cherry picked from commit 699cec1a8db88c621f4378764614ba589c3ace11)

src/video/wayland/SDL_waylandvideo.c

@@ -478,17 +478,8 @@ static void display_handle_geometry(void *data,
 
 {
     SDL_WaylandOutputData *driverdata = data;
-    SDL_VideoDisplay *display;
-    int i;
 
     if (driverdata->wl_output_done_count) {
-        /* Clear the wl_output ref so Reset doesn't free it */
-        display = SDL_GetDisplay(driverdata->index);
-        for (i = 0; i < display->num_display_modes; i += 1) {
-            display->display_modes[i].driverdata = NULL;
-        }
-
-        /* Okay, now it's safe to reset */
         SDL_ResetDisplayModes(driverdata->index);
 
         /* The display has officially started over. */
@@ -600,7 +591,6 @@ static void display_handle_done(void *data,
         native_mode.h = driverdata->native_height;
     }
     native_mode.refresh_rate = (int)SDL_round(driverdata->refresh / 1000.0); /* mHz to Hz */
-    native_mode.driverdata = driverdata->output;
 
     /* The scaled desktop mode */
     SDL_zero(desktop_mode);
@@ -622,7 +612,6 @@ static void display_handle_done(void *data,
         desktop_mode.h = driverdata->width;
     }
     desktop_mode.refresh_rate = (int)SDL_round(driverdata->refresh / 1000.0); /* mHz to Hz */
-    desktop_mode.driverdata = driverdata->output;
 
     /*
      * The native display mode is only exposed separately from the desktop size if the
@@ -1014,7 +1003,7 @@ static int Wayland_GetDisplayDPI(_THIS, SDL_VideoDisplay *sdl_display, float *dd
 static void Wayland_VideoCleanup(_THIS)
 {
     SDL_VideoData *data = _this->driverdata;
-    int i, j;
+    int i;
 
     Wayland_QuitWin(data);
     Wayland_FiniMouse(data);
@@ -1030,10 +1019,6 @@ static void Wayland_VideoCleanup(_THIS)
         SDL_free(display->driverdata);
         display->driverdata = NULL;
 
-        for (j = display->num_display_modes; j--;) {
-            display->display_modes[j].driverdata = NULL;
-        }
-        display->desktop_mode.driverdata = NULL;
         SDL_DelVideoDisplay(i);
     }
     data->output_list = NULL;