softpipe: add const qualifier to silence warnings

diff --git a/src/gallium/drivers/softpipe/sp_tex_sample.c b/src/gallium/drivers/softpipe/sp_tex_sample.c
index 76ec2f4..89c6536 100644 (file)
--- a/src/gallium/drivers/softpipe/sp_tex_sample.c
+++ b/src/gallium/drivers/softpipe/sp_tex_sample.c
@@ -2620,7 +2620,7 @@ sample_get_texels(struct tgsi_sampler *tgsi_sampler,
    union tex_tile_address addr;
    const struct pipe_resource *texture = samp->view->texture;
    int j, c;
-   float *tx;
+   const float *tx;
 
    addr.value = 0;
    /* TODO write a better test for LOD */