Fix wayland reconnection paths

Most of this code is disabled out for now.

- For mouse cursors we have a wl_surface for both system and custom
cursors which needs recreating.
 - The other patch is about nullification after deletions

src/video/wayland/SDL_waylandmouse.c

@@ -620,11 +620,10 @@ Wayland_RecreateCursor(SDL_Cursor *cursor, SDL_VideoData *vdata)
         create_buffer_from_shm(cdata, cdata->w, cdata->h, WL_SHM_FORMAT_ARGB8888);
 
         SDL_memcpy(cdata->shm_data, old_data_pointer, stride * cdata->h);
-
+    }
     cdata->surface = wl_compositor_create_surface(vdata->compositor);
     wl_surface_set_user_data(cdata->surface, NULL);
 }
-}
 
 void
 Wayland_RecreateCursors(void)
@@ -691,7 +690,9 @@ Wayland_FiniMouse(SDL_VideoData *data)
     for (i = 0; i < data->num_cursor_themes; i += 1) {
         WAYLAND_wl_cursor_theme_destroy(data->cursor_themes[i].theme);
     }
+    data->num_cursor_themes = 0;
     SDL_free(data->cursor_themes);
+    data->cursor_themes = NULL;
 
     SDL_DelHintCallback(SDL_HINT_VIDEO_WAYLAND_EMULATE_MOUSE_WARP, 
                         Wayland_EmulateMouseWarpChanged, input);

src/video/wayland/SDL_waylandvideo.c

@@ -1053,6 +1053,7 @@ Wayland_VideoCleanup(_THIS)
         display->desktop_mode.driverdata = NULL;
         SDL_DelVideoDisplay(i);
     }
+    data->output_list = NULL;
 
     Wayland_display_destroy_input(data);
     Wayland_display_destroy_pointer_constraints(data);