ddraw: Print an ERR for non-zero sub-resource indices in ddraw_surface7_Flip().

dlls/ddraw/surface.c

@@ -1239,6 +1239,8 @@ static HRESULT WINAPI DECLSPEC_HOTPATCH ddraw_surface7_Flip(IDirectDrawSurface7
 
     tmp_rtv = ddraw_surface_get_rendertarget_view(dst_impl);
     tmp = dst_impl->wined3d_surface;
+    if (dst_impl->sub_resource_idx)
+        ERR("Invalid sub-resource index %u on surface %p.\n", dst_impl->sub_resource_idx, dst_impl);
     texture = dst_impl->wined3d_texture;
     rtv = wined3d_device_get_rendertarget_view(dst_impl->ddraw->wined3d_device, 0);
     ddraw_texture = wined3d_texture_get_parent(dst_impl->wined3d_texture);
@@ -1271,6 +1273,8 @@ static HRESULT WINAPI DECLSPEC_HOTPATCH ddraw_surface7_Flip(IDirectDrawSurface7
         dst_impl->wined3d_surface = src_impl->wined3d_surface;
         prev_ddraw_texture = wined3d_texture_get_parent(src_impl->wined3d_texture);
         wined3d_resource_set_parent(wined3d_texture_get_resource(src_impl->wined3d_texture), ddraw_texture);
+        if (src_impl->sub_resource_idx)
+            ERR("Invalid sub-resource index %u on surface %p.\n", src_impl->sub_resource_idx, src_impl);
         dst_impl->wined3d_texture = src_impl->wined3d_texture;
         ddraw_texture = prev_ddraw_texture;
     }
@@ -1302,6 +1306,8 @@ static HRESULT WINAPI DECLSPEC_HOTPATCH ddraw_surface7_Flip(IDirectDrawSurface7
             prev_ddraw_texture = wined3d_texture_get_parent(src_impl->wined3d_texture);
             wined3d_resource_set_parent(wined3d_texture_get_resource(src_impl->wined3d_texture), ddraw_texture);
             ddraw_texture = prev_ddraw_texture;
+            if (src_impl->sub_resource_idx)
+                ERR("Invalid sub-resource index %u on surface %p.\n", src_impl->sub_resource_idx, src_impl);
             dst_impl->wined3d_texture = src_impl->wined3d_texture;
             dst_impl = src_impl;
         }