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urlmon: Fix call to ReadFile. 

The BytesRead parameter passed to ReadFile may never be NULL.
This commit is contained in:
Thomas Weidenmueller 2005-12-09 11:22:59 +01:00 committed by Alexandre Julliard
parent 648cc6f435
commit 38bfd5e635
1 changed files with 2 additions and 1 deletions
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3
dlls/urlmon/umstream.c
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@ -225,6 +225,7 @@ static HRESULT WINAPI IStream_fnRead (IStream * iface,
ULONG cb,
ULONG* pcbRead)
{
DWORD dwBytesRead;
IUMCacheStream *This = (IUMCacheStream *)iface;
TRACE("(%p)->(%p,0x%08lx,%p)\n",This, pv, cb, pcbRead);
@ -232,7 +233,7 @@ static HRESULT WINAPI IStream_fnRead (IStream * iface,
if ( !pv )
return STG_E_INVALIDPOINTER;
if ( ! ReadFile( This->handle, pv, cb, pcbRead, NULL ) )
if ( ! ReadFile( This->handle, pv, cb, (pcbRead ? pcbRead : &dwBytesRead), NULL ) )
return S_FALSE;
if (!*pcbRead)