wined3d: Make the device parameter to device_preload_textures() const.

dlls/wined3d/device.c

@@ -461,7 +461,7 @@ static void device_preload_texture(const struct wined3d_state *state, unsigned i
     texture->texture_ops->texture_preload(texture, srgb);
 }
 
-void device_preload_textures(struct wined3d_device *device)
+void device_preload_textures(const struct wined3d_device *device)
 {
     const struct wined3d_state *state = &device->stateBlock->state;
     unsigned int i;

dlls/wined3d/wined3d_private.h

@@ -1753,7 +1753,7 @@ void device_context_remove(struct wined3d_device *device, struct wined3d_context
 HRESULT device_init(struct wined3d_device *device, struct wined3d *wined3d,
         UINT adapter_idx, WINED3DDEVTYPE device_type, HWND focus_window, DWORD flags,
         BYTE surface_alignment, struct wined3d_device_parent *device_parent) DECLSPEC_HIDDEN;
-void device_preload_textures(struct wined3d_device *device) DECLSPEC_HIDDEN;
+void device_preload_textures(const struct wined3d_device *device) DECLSPEC_HIDDEN;
 LRESULT device_process_message(struct wined3d_device *device, HWND window, BOOL unicode,
         UINT message, WPARAM wparam, LPARAM lparam, WNDPROC proc) DECLSPEC_HIDDEN;
 void device_resource_add(struct wined3d_device *device, struct wined3d_resource *resource) DECLSPEC_HIDDEN;