[965] Replace XXX comment about constant swizzle with an assert.

src/mesa/drivers/dri/i965/brw_vs_tnl.c

@@ -404,7 +404,7 @@ static struct ureg register_const4f( struct tnl_program *p,
    values[3] = s3;
    idx = _mesa_add_unnamed_constant( p->program->Base.Parameters, values, 4,
                                      &swizzle);
-   /* XXX what about swizzle? */
+   assert(swizzle == SWIZZLE_NOOP); /* Need to handle swizzle in reg setup */
    return make_ureg(PROGRAM_STATE_VAR, idx);
 }
 

src/mesa/drivers/dri/i965/brw_wm_fp.c

@@ -464,7 +464,7 @@ static struct prog_src_register search_or_add_const4f( struct brw_wm_compile *c,
    }
    
    idx = _mesa_add_unnamed_constant( paramList, values, 4, &swizzle );
-   /* XXX what about swizzle? */
+   assert(swizzle == SWIZZLE_NOOP); /* Need to handle swizzle in reg setup */
    return src_reg(PROGRAM_STATE_VAR, idx);
 }