求助各位大神求助啊！！！！（memwatch检查内存错误）

============= MEMWATCH 2.71 Copyright (C) 1992-1999 Johan Lindh =============

Started at Mon May 27 17:20:04 2013

Modes: __STDC__ 64-bit mwDWORD==(unsigned long)
mwROUNDALLOC==8 sizeof(mwData)==32 mwDataSize==32

relink: <964587> venc.c(623) attempting to repair MW-0x223a010...
relink: MW-0x223a010 is the head (first) allocation
relink: MW-0x223a010 not found in reverse chain search
relink: heap verification FAILS - aborting program



if (stStream.pstPack != NULL)
{
iRet = HI_MPI_VENC_ReleaseStream(iChn,&stStream);
if (HI_SUCCESS != iRet)
{
free(stStream.pstPack);
stStream.pstPack = NULL;
printf("HI_MPI_VENC_ReleaseStream failed! iRet %08x\n", iRet);
break;
}
if (stStream.pstPack != NULL)
{
free(stStream.pstPack);//这是623行
stStream.pstPack = NULL;
}
}



求各位大神们指点迷津，让我回头是岸吧！！！