nine: init more draw info members

Reviewed-by: <Axel Davy davyaxel0@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12284>

src/gallium/frontends/nine/nine_state.c

@@ -2370,6 +2370,8 @@ init_draw_info(struct pipe_draw_info *info,
     info->primitive_restart = FALSE;
     info->has_user_indices = FALSE;
     info->take_index_buffer_ownership = FALSE;
+    info->index_bias_varies = FALSE;
+    info->increment_draw_id = FALSE;
     info->restart_index = 0;
 }