Tags: patch

This patch adds next-error support for flymake diagnostics buffers.
Buffers created with `flymake-show-buffer-diagnostics' and
`flymake-show-project-diagnostics' are now next-error enabled, and
`next-error' and `previous-error' will navigate through their listed
diagnostics.

In GNU Emacs 30.1.50 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo
version 1.18.2, Xaw3d scroll bars)
Windowing system distributor 'The X.Org Foundation', version 11.0.12101016
System Description: NixOS 24.11 (Vicuna)

Configured using:
 'configure
 --prefix=/nix/store/yffwm14bwi3vask5wfx6pcrdgxck61ba-emacs-30.1
 --disable-build-details --with-modules --with-x-toolkit=lucid
 --with-cairo --with-xft --with-compress-install
 --with-toolkit-scroll-bars --with-native-compilation
 --without-imagemagick --with-mailutils --without-small-ja-dic
 --with-tree-sitter --with-xinput2 --without-xwidgets --with-dbus
 --with-selinux'