Please describe the problem:
libxslt_xsltPythonCleanup calls several xmlHashFree() but doesn't clear the hash
table pointers thereafter.
So a Python call to libxslt.pythonCleanup() followed by a
libxslt.registerExtModuleFunction(...) generates a segfault.

Steps to reproduce:
1. libxslt.registerExtModuleFunction(...)
2. libxslt.pythonCleanup()
3. libxslt.registerExtModuleFunction(...)

Actual results:
segfault

Expected results:


Does this happen every time?
yes

Other information:
diff -Naur libxslt-1.1.12-old/python/libxslt.c libxslt-1.1.12/python/libxslt.c
--- libxslt-1.1.12-old/python/libxslt.c 2004-07-02 15:49:07.000000000 +0200
+++ libxslt-1.1.12/python/libxslt.c     2005-05-27 15:54:00.055235480 +0200
@@ -845,15 +845,19 @@

     if (libxslt_extModuleFunctions != NULL) {
        xmlHashFree(libxslt_extModuleFunctions, deallocateCallback);
+       libxslt_extModuleFunctions = NULL;
     }
     if (libxslt_extModuleElements != NULL) {
        xmlHashFree(libxslt_extModuleElements, deallocateCallback);
+       libxslt_extModuleElements = NULL;
     }
     if (libxslt_extModuleElementPreComp != NULL) {
        xmlHashFree(libxslt_extModuleElementPreComp, deallocateCallback);
+       libxslt_extModuleElementPreComp = NULL;
     }
     if (libxslt_extModuleClasses != NULL) {
        xmlHashFree(libxslt_extModuleClasses, deallocateClasse);
+       libxslt_extModuleClasses = NULL;
     }
     xsltCleanupGlobals();
     Py_INCREF(Py_None);
p