libintl.h must provide the wrapper for newlocale() before the 
function is used by the spa plugin headers.

Index: modules/module-lua-scripting/api/api.c
--- modules/module-lua-scripting/api/api.c.orig
+++ modules/module-lua-scripting/api/api.c
@@ -8,9 +8,9 @@
 
 #include <glib/gstdio.h>
 #include <wp/wp.h>
+#include <libintl.h>
 #include <pipewire/pipewire.h>
 #include <wplua/wplua.h>
-#include <libintl.h>
 
 #define WP_LOCAL_LOG_TOPIC log_topic_lua_scripting
 WP_LOG_TOPIC_EXTERN (log_topic_lua_scripting)
