st/mesa: fix wrong initialization of MaxPointSize

src/mesa/state_tracker/st_extensions.c

@@ -114,6 +114,10 @@ void st_init_limits(struct st_context *st)
       = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH));
    c->MaxPointSizeAA
       = _maxf(1.0f, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH_AA));
+   /* called after _mesa_create_context/_mesa_init_point, fix default user
+    * settable max point size up
+    */
+   st->ctx->Point.MaxSize = MAX2(c->MaxPointSize, c->MaxPointSizeAA);
    /* these are not queryable. Note that GL basically mandates a 1.0 minimum
     * for non-aa sizes, but we can go down to 0.0 for aa points.
     */