d3d8: Use wined3d_texture_get_sub_resource_parent() in d3d8_device_create_surface().

dlls/d3d8/device.c

@@ -937,7 +937,6 @@ static HRESULT d3d8_device_create_surface(struct d3d8_device *device, UINT width
         D3DFORMAT format, DWORD flags, IDirect3DSurface8 **surface, UINT usage, D3DPOOL pool,
         D3DMULTISAMPLE_TYPE multisample_type, DWORD multisample_quality)
 {
-    struct wined3d_resource *sub_resource;
     struct wined3d_resource_desc desc;
     struct d3d8_surface *surface_impl;
     struct wined3d_texture *texture;
@@ -969,8 +968,7 @@ static HRESULT d3d8_device_create_surface(struct d3d8_device *device, UINT width
         return hr;
     }
 
-    sub_resource = wined3d_texture_get_sub_resource(texture, 0);
-    surface_impl = wined3d_resource_get_parent(sub_resource);
+    surface_impl = wined3d_texture_get_sub_resource_parent(texture, 0);
     surface_impl->parent_device = &device->IDirect3DDevice8_iface;
     *surface = &surface_impl->IDirect3DSurface8_iface;
     IDirect3DSurface8_AddRef(*surface);