[1/3] wininet: Don't return available data sizes larger than the read buffer.

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?
Full results can be found at
https://testbot.winehq.org/JobDetails.pl?Key=24338

Your paranoid android.


=== w864 (64 bit http) ===
http.c:5309: Test failed: HttpSendRequest failed: 8