svga: remove pointless assert on unsigned >= 0

all unsigneds are >= 0 :-)

There may be an argument for leaving this in, in case someone
changes min_lod to an integer, so feel free to apply or drop.

Reviewed-by: Brian Paul <brianp@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/gallium/drivers/svga/svga_sampler_view.c

@@ -65,7 +65,6 @@ svga_get_tex_sampler_view(struct pipe_context *pipe,
    boolean view = TRUE;
 
    assert(pt);
-   assert(min_lod >= 0);
    assert(min_lod <= max_lod);
    assert(max_lod <= pt->last_level);