tnl: add const qualifier to silence warning

diff --git a/src/mesa/tnl/t_draw.c b/src/mesa/tnl/t_draw.c
index a5225c439b5b9e1054802d3fce46f48ceb5ddd46..283ab6954857a4cc78d9970ccc296718be964ea5 100644 (file)
--- a/src/mesa/tnl/t_draw.c
+++ b/src/mesa/tnl/t_draw.c
@@ -340,7 +340,7 @@ static void bind_indices( struct gl_context *ctx,
    TNLcontext *tnl = TNL_CONTEXT(ctx);
    struct vertex_buffer *VB = &tnl->vb;
    GLuint i;
-   void *ptr;
+   const void *ptr;
 
    if (!ib) {
       VB->Elts = NULL;