stabber: disable blanket -Werror

Without the change `stabber` fails to build on `staging-next` as:

    src/server/stanza.c: In function 'stanza_to_string':
    /nix/store/dlkvzm8kb7s8bhni6f23i1p2qcv8w4dq-glib-2.78.3-dev/include/glib-2.0/glib/gstring.h:74:5: error: ignoring return value of 'g_string_free_and_steal' declared with attribute 'warn_unused_result' [-Werror=unused-result]

It happens due to blanket `-Werror` option. Disable it.

1 files changed, 5 insertions, 0 deletions

diff --git a/pkgs/misc/stabber/default.nix b/pkgs/misc/stabber/default.nix
index ff89241a24698..7ec9a8985e1de 100644
--- a/pkgs/misc/stabber/default.nix
+++ b/pkgs/misc/stabber/default.nix
@@ -15,6 +15,11 @@ stdenv.mkDerivation {
     sha256 = "0042nbgagl4gcxa5fj7bikjdi1gbk0jwyqnzc5lswpb0l5y0i1ql";
   };
 
+  postPatch = ''
+    # New toolchainsd like gcc-13 trigger warnings and fail the build.
+    substituteInPlace configure.ac --replace "-Werror" ""
+  '';
+
   preAutoreconf = ''
     mkdir m4
   '';