wined3d: Fix TRACE in shader_dump_decl_usage().

[Henri Verbeet]

On 15 September 2015 at 11:11, Andrey Gusev <andrey.goosev at gmail.com> wrote:
>              case WINED3D_SHADER_RESOURCE_TEXTURE_3D:
> -                TRACE("_volume");
> +                TRACE("_3d");
I think the change makes sense, but it's not really a fix. We can
essentially call this whatever we like. Originally this was based on
the d3d9 naming where you have "dcl_volume". OpenGL and d3d10+ call
these 3D textures.