avoid a problem in catalog cleanup on SMP if catalogs were not

* catalog.c: avoid a problem in catalog cleanup on SMP if
  catalogs were not initialized.
Daniel

ChangeLog

+Tue Oct 16 08:43:43 EDT 2001 Daniel Veillard <daniel@veillard.com>
+
+	* catalog.c: avoid a problem in catalog cleanup on SMP if
+	  catalogs were not initialized.
+
 Tue Oct 16 14:33:19 CEST 2001 Daniel Veillard <daniel@veillard.com>
 
 	* catalog.c xpath.c: trying to cleanup the not thread safe

catalog.c

@@ -2869,6 +2869,9 @@ xmlLoadCatalogs(const char *pathss) {
  */
 void
 xmlCatalogCleanup(void) {
+    if (xmlCatalogInitialized == 0)
+        return;
+
     xmlRMutexLock(xmlCatalogMutex);
     if (xmlDebugCatalogs)
 	xmlGenericError(xmlGenericErrorContext,