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[xml] using sax + freeing mem

hi...
i got a problem using the sax parser. After having used it i have a 
memory leak. i guess it is the parser context that does not get freed 
properly.

(in fact if i do not call StreamBuffer_Add() the memory leak does not 
appear... therefor the problem should be in there. the callback 
functions of the sax are set to NULL;)

the code looks like this:

myclass::StreamBuffer_Add(const char *recvBuff,int iRecv)
{
	bool bReturn false;

	if(m_ptxmlParserCtx == 0)
	{
		//new parser ctx buffer required...
		m_ptxmlParserCtx = xmlCreatePushParserCtxt(&x_SAXHandlerStruct,
															this,
															recvBuff,
															4,
															0);

		if(m_ptxmlParserCtx != 0)
		{
			if(xmlParseChunk(m_ptxmlParserCtx, recvBuff+4, iRecv-4, 0) == 0)
			{
				bReturn = true;
			}
		}
	}
	else
	{
	    	if(xmlParseChunk(m_ptxmlParserCtx, recvBuff, iRecv, 0) == 0)
		{
			bReturn = true;				
		}
	}
}

myclass::~myclass
{
	if(m_ptxmlParserCtx != 0)
	{
		xmlFreeParserCtxt(m_ptxmlParserCtx);
		m_ptxmlParserCtx = 0;
	}
	
	//xmlCleanupParser();
}

whatever there is still memory filled:
dump: see p.s.
i also added xmlCleanupParser(); in the destructor but that did not 
help and will be called later anyway...

p.s.
00000072	3.46801311	[3280] Detected memory leaks!	
00000073	3.46806871	[3280] Dumping objects ->	
00000074	3.46819917	[3280] {5857} 	
00000075	3.46824303	[3280] normal block at 0x00CBF0D0, 20 bytes long.	

00000076	3.46829415	[3280]  Data: <        @ T     > 98 F0 CB 00 00 
00 00 00 40 A6 54 00 00 00 00 00 	
00000077	3.46833243	[3280] {5856} 	
00000078	3.46837098	[3280] normal block at 0x00CBF098, 5 bytes long.	
00000079	3.46841177	[3280]  Data: <HTML > 48 54 4D 4C 00 	
00000080	3.46845702	[3280] {5855} 	
00000081	3.46849586	[3280] normal block at 0x00CBF050, 20 bytes long.	

00000082	3.46856709	[3280]  Data: <      S   S     > 18 F0 CB 00 10 
96 53 00 B0 96 53 00 00 00 00 00 	
00000083	3.46858050	[3280] {5854} 	
00000084	3.46861850	[3280] normal block at 0x00CBF018, 9 bytes long.	
00000085	3.46866180	[3280]  Data: <US-ASCII > 55 53 2D 41 53 43 49 49 
00 	
00000086	3.46869895	[3280] {5853} 	
00000087	3.46874282	[3280] normal block at 0x00CBEFD0, 20 bytes long.	

00000088	3.46879087	[3280]  Data: <      S   S     > 98 EF CB 00 10 
96 53 00 B0 96 53 00 00 00 00 00 	
00000089	3.46882858	[3280] {5852} 	
00000090	3.46887440	[3280] normal block at 0x00CBEF98, 6 bytes long.	
00000091	3.46891602	[3280]  Data: <ASCII > 41 53 43 49 49 00 	
00000092	3.46895262	[3280] {5851} 	
00000093	3.46899089	[3280] normal block at 0x00CBEF50, 20 bytes long.	

00000094	3.46903866	[3280]  Data: <      S   S     > 18 EF CB 00 F0 
97 53 00 10 99 53 00 00 00 00 00 	
00000095	3.46907638	[3280] {5850} 	
00000096	3.46911465	[3280] normal block at 0x00CBEF18, 11 bytes long.	

00000097	3.46915907	[3280]  Data: <ISO-8859-1 > 49 53 4F 2D 38 38 35 
39 2D 31 00 	
00000098	3.46919678	[3280] {5849} 	
00000099	3.46923506	[3280] normal block at 0x00CBEED0, 20 bytes long.	

00000100	3.46931356	[3280]  Data: <      S   S     > 98 EE CB 00 20 
9E 53 00 E0 9F 53 00 00 00 00 00 	
00000101	3.46932669	[3280] {5848} 	
00000102	3.46936440	[3280] normal block at 0x00CBEE98, 9 bytes long.	
00000103	3.46940770	[3280]  Data: <UTF-16BE > 55 54 46 2D 31 36 42 45 
00 	
00000104	3.46944458	[3280] {5847} 	
00000105	3.46948285	[3280] normal block at 0x00CBEE50, 20 bytes long.	

00000106	3.46953062	[3280]  Data: <    @ S   S     > 18 EE CB 00 40 
9A 53 00 F0 9B 53 00 00 00 00 00 	
00000107	3.46956806	[3280] {5846} 	
00000108	3.46960633	[3280] normal block at 0x00CBEE18, 9 bytes long.	
00000109	3.46964935	[3280]  Data: <UTF-16LE > 55 54 46 2D 31 36 4C 45 
00 	
00000110	3.46969349	[3280] {5845} 	
00000111	3.46973763	[3280] normal block at 0x00CBEDD0, 20 bytes long.	

00000112	3.46978569	[3280]  Data: <      S   S     > B0 08 CC 00 B0 
98 53 00 B0 98 53 00 00 00 00 00 	
00000113	3.46982312	[3280] {5844} 	
00000114	3.46986139	[3280] normal block at 0x00CC08B0, 6 bytes long.	
00000115	3.46990246	[3280]  Data: <UTF-8 > 55 54 46 2D 38 00 	
00000116	3.46993934	[3280] {5843} 	
00000117	3.46997761	[3280] normal block at 0x00CBECD8, 200 bytes 
long.	
00000118	3.47004941	[3280]  Data: <    P       P   > D0 ED CB 00 50 
EE CB 00 D0 EE CB 00 50 EF CB 00 	
00000119	3.47006254	[3280] Object dump complete.
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