Update function declaration to not conflict with C++ reserved words
diff --git a/guththila/include/guththila_xml_writer.h b/guththila/include/guththila_xml_writer.h
index afc5a26..f57d1be 100644
--- a/guththila/include/guththila_xml_writer.h
+++ b/guththila/include/guththila_xml_writer.h
@@ -500,7 +500,7 @@
  */
 GUTHTHILA_EXPORT char *GUTHTHILA_CALL guththila_get_prefix_for_namespace(
     guththila_xml_writer_t * wr,
-    char *namespace,
+    char *namespace_uri,
     const axutil_env_t * env);
 
 EXTERN_C_END()