[libxml2] Fix --without-debug build

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 8d06ccd47959e3fd10e49ebb7582d73c5fc9f1dd
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Wed Mar 9 22:36:51 2022 +0100

    Fix --without-debug build
    
    Broken in commit 2cc93f77.
    
    Fixes #354.

 schematron.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/schematron.c b/schematron.c
index debadba4..19a3d39a 100644
--- a/schematron.c
+++ b/schematron.c
@@ -33,7 +33,6 @@
 #include <libxml/xpathInternals.h>
 #include <libxml/pattern.h>
 #include <libxml/schematron.h>
-#include <libxml/debugXML.h>
 
 #define SCHEMATRON_PARSE_OPTIONS XML_PARSE_NOENT
 
@@ -1497,9 +1496,11 @@ xmlSchematronFormatReport(xmlSchematronValidCtxtPtr ctxt,
                 }
                 break;
             }
-            case XPATH_BOOLEAN:
-                ret = xmlStrcat(ret, BAD_CAST xmlBoolToText(eval->boolval));
+            case XPATH_BOOLEAN: {
+                const char *str = eval->boolval ? "True" : "False";
+                ret = xmlStrcat(ret, BAD_CAST str);
                 break;
+            }
             case XPATH_NUMBER: {
                 xmlChar *buf;
                 int size;