d3d9: Use wined3d_texture_get_sub_resource_parent() in d3d9_device_create_surface().

dlls/d3d9/device.c

@@ -1108,7 +1108,6 @@ static HRESULT d3d9_device_create_surface(struct d3d9_device *device, UINT width
         D3DFORMAT format, DWORD flags, IDirect3DSurface9 **surface, UINT usage, D3DPOOL pool,
         D3DMULTISAMPLE_TYPE multisample_type, DWORD multisample_quality, void *user_mem)
 {
-    struct wined3d_resource *sub_resource;
     struct wined3d_resource_desc desc;
     struct d3d9_surface *surface_impl;
     struct wined3d_texture *texture;
@@ -1142,8 +1141,7 @@ static HRESULT d3d9_device_create_surface(struct d3d9_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->IDirect3DDevice9Ex_iface;
     *surface = &surface_impl->IDirect3DSurface9_iface;
     IDirect3DSurface9_AddRef(*surface);