[xml] Memory Leaks in parse3.c example

[Chris Johnson <chris dolphtech com>]

All -

While working with parser3.c example 
(http://xmlsoft.org/examples/parse3.c) on Solaris 8 Rational Purify 
identifies several areas as having leaked memory.

Modifying parse3.c to

while(1)
   example3Func(document, 6);

and closely monitoring the process using 'top' clearly shows the process 
eating memory.

Any feedback on identified problem areas would be very helpful.

..Chris

------ SNIPPETS FROM RATIONAL PURIFY ----------------

              main           [parse3.c:47]
                      * between the version it was compiled for and the 
actual shared
                      * library used.
                      */
              =>     LIBXML_TEST_VERSION
                
                     example3Func(document, 6);

              example3Func   [parse3.c:33]
                      * The document being in memory, it have no base 
per RFC 2396,
                      * and the "noname.xml" argument will serve as its 
base.
                      */
              =>     doc = xmlReadMemory(content, length, "noname.xml", 
NULL, 0);
                     if (doc == NULL) {
                         fprintf(stderr, "Failed to parse document\n");
                         return;
              main           [parse3.c:54]
                     /*
                      * Cleanup function for the XML library.
                      */
              =>     xmlCleanupParser();
                     /*
                      * this is to debug memory for regression tests
                      */