adding xmlMemBlocks() work on generator of an automatic API regression

* xmlmemory.c include/libxml/xmlmemory.h: adding xmlMemBlocks()
* Makefile.am gentest.py testapi.c: work on generator of an
  automatic API regression test tool.
* SAX2.c nanoftp.c parser.c parserInternals.c tree.c xmlIO.c
  xmlstring.c: various API hardeing changes as a result of running
  teh first set of automatic API regression tests.
* test/slashdot16.xml: apparently missing from CVS, commited it
Daniel

1 files changed, 9 insertions, 3 deletions

diff --git a/nanoftp.c b/nanoftp.c
index 16e6242f..30d143ff 100644
--- a/nanoftp.c
+++ b/nanoftp.c
@@ -260,12 +260,18 @@ xmlNanoFTPCleanup(void) {
 void
 xmlNanoFTPProxy(const char *host, int port, const char *user,
 	        const char *passwd, int type) {
-    if (proxy != NULL)
+    if (proxy != NULL) {
 	xmlFree(proxy);
-    if (proxyUser != NULL)
+	proxy = NULL;
+    }
+    if (proxyUser != NULL) {
 	xmlFree(proxyUser);
-    if (proxyPasswd != NULL)
+	proxyUser = NULL;
+    }
+    if (proxyPasswd != NULL) {
 	xmlFree(proxyPasswd);
+	proxyPasswd = NULL;
+    }
     if (host)
 	proxy = xmlMemStrdup(host);
     if (user)