wininet: Return data available in current chunk in chunked_get_avail_data.

[Sebastian Lackner]

On 02.08.2016 15:33, Jacek Caban wrote:
> 
> Based on patch by Hans Leidekker.
> 
> Signed-off-by: Jacek Caban <jacek at codeweavers.com>
> ---
>  dlls/wininet/http.c | 26 ++++++++++++++++++++------
>  1 file changed, 20 insertions(+), 6 deletions(-)
> 

It seems like this patch introduced test failures here:

../../../tools/runtest -q -P wine -T ../../.. -M wininet.dll -p wininet_test.exe.so http && touch http.ok
http.c:815: Test failed: length = 12960, expected <= 8192