Fix for Python 3.13.

--- recoll-1.27.9/python/pychm/recollchm/swig_chm.c	2020-09-05 08:43:16.000000000 +0100
+++ recoll-1.27.9/python/pychm/recollchm/swig_chm.c	2025-04-18 13:25:44.670409695 +0100
@@ -3090,7 +3090,7 @@
     /* Time to call the callback */
     arglist = Py_BuildValue("(OOO)", py_h, py_ui, py_c);
     if (arglist) {
-      result = PyEval_CallObject(my_callback, arglist);
+      result = PyObject_CallObject(my_callback, arglist);
       Py_DECREF(arglist);
       Py_DECREF(result);