[libxslt] Migrate from PyEval_ to PyObject_

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 43e3b41defefc4ecfbecc099692ba97d1c5b2e97
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Mon Aug 29 17:23:08 2022 +0200

    Migrate from PyEval_ to PyObject_
    
    PyEval_ functions are deprecated.

 .gitlab-ci.yml   | 3 +--
 python/libxslt.c | 8 ++++----
 2 files changed, 5 insertions(+), 6 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index d4af61c8..2ca5355b 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -27,8 +27,7 @@ gcc:
 gcc:python3:
   extends: .test
   variables:
-    # TODO: Re-enable the warning after libxml2 #208 is fixed.
-    CFLAGS: "-O2 -Wno-error=deprecated-declarations"
+    CFLAGS: "-O2"
     PYTHON: "/usr/bin/python3"
 
 gcc:static:
diff --git a/python/libxslt.c b/python/libxslt.c
index 0758d606..0e2786ce 100644
--- a/python/libxslt.c
+++ b/python/libxslt.c
@@ -299,7 +299,7 @@ libxslt_xsltElementPreCompCallback(xsltStylesheetPtr style, xmlNodePtr inst,
            pyobj_element_f);
 
     Py_INCREF(pyobj_precomp_f); /* Protect refcount against reentrant manipulation of callback hash */
-    result = PyEval_CallObject(pyobj_precomp_f, args);
+    result = PyObject_CallObject(pyobj_precomp_f, args);
     Py_DECREF(pyobj_precomp_f);
     Py_DECREF(args);
 
@@ -357,7 +357,7 @@ libxslt_xsltElementTransformCallback(xsltTransformContextPtr ctxt,
        libxslt_xsltElemPreCompPtrWrap(comp));
 
     Py_INCREF(func); /* Protect refcount against reentrant manipulation of callback hash */
-    result = PyEval_CallObject(func, args);
+    result = PyObject_CallObject(func, args);
     Py_DECREF(func);
     Py_DECREF(args);
 
@@ -468,7 +468,7 @@ libxslt_xmlXPathFuncCallback(xmlXPathParserContextPtr ctxt, int nargs) {
     }
 
     Py_INCREF(current_function);
-    result = PyEval_CallObject(current_function, list);
+    result = PyObject_CallObject(current_function, list);
     Py_DECREF(current_function);
     Py_DECREF(list);
 
@@ -961,7 +961,7 @@ libxslt_xsltErrorFuncHandler(void *ctx ATTRIBUTE_UNUSED, const char *msg,
         Py_XINCREF(libxslt_xsltPythonErrorFuncCtxt);
         message = libxml_charPtrWrap(str);
         PyTuple_SetItem(list, 1, message);
-        result = PyEval_CallObject(libxslt_xsltPythonErrorFuncHandler, list);
+        result = PyObject_CallObject(libxslt_xsltPythonErrorFuncHandler, list);
         Py_XDECREF(list);
         Py_XDECREF(result);
     }