Add guard before calling ctx->Driver.BindProgram

diff --git a/src/mesa/tnl/t_vp_build.c b/src/mesa/tnl/t_vp_build.c
index 2d42faf..77e1051 100644 (file)
--- a/src/mesa/tnl/t_vp_build.c
+++ b/src/mesa/tnl/t_vp_build.c
@@ -1536,7 +1536,8 @@ void _tnl_UpdateFixedFunctionProgram( GLcontext *ctx )
    /* Tell the driver about the change.  Could define a new target for
     * this?
     */
-   if (ctx->VertexProgram._Current != prev) 
+   if (ctx->VertexProgram._Current != prev &&
+       ctx->Driver.BindProgram) 
       ctx->Driver.BindProgram(ctx, GL_VERTEX_PROGRAM_ARB, (struct program *)
                              ctx->VertexProgram._Current);   
 }