[PATCH] wininet: Fix an MSVC warning about status_string.

[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=39932

Your paranoid android.


=== wvistau64 (32 bit http) ===
http.c:354: Test failed: unexpected status 30 (INTERNET_STATUS_SENDING_REQUEST)
http.c:354: Test failed: unexpected status 31 (INTERNET_STATUS_REQUEST_SENT)
http.c:354: Test failed: unexpected status 40 (INTERNET_STATUS_RECEIVING_RESPONSE)
http.c:354: Test failed: unexpected status 41 (INTERNET_STATUS_RESPONSE_RECEIVED)
http.c:4441: Test failed: expected status 30 (INTERNET_STATUS_SENDING_REQUEST) 1 times, received 2 times
http.c:4442: Test failed: expected status 31 (INTERNET_STATUS_REQUEST_SENT) 1 times, received 2 times
http.c:4443: Test failed: expected status 40 (INTERNET_STATUS_RECEIVING_RESPONSE) 1 times, received 2 times
http.c:4444: Test failed: expected status 41 (INTERNET_STATUS_RESPONSE_RECEIVED) 1 times, received 2 times