[Bug 46349] New: wininet/tests/http.c shows uninitialized memory use

https://bugs.winehq.org/show_bug.cgi?id=46349

Bug ID: 46349
           Summary: wininet/tests/http.c shows uninitialized memory use
           Product: Wine
           Version: 4.0-rc3
          Hardware: x86
                OS: Linux
            Status: NEW
          Keywords: download, source, testcase, valgrind
          Severity: normal
          Priority: P2
         Component: wininet
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: Gentoo

==23151== Thread 5:
==23151== Syscall param sendmsg(msg.msg_iov[0]) points to uninitialised byte(s)
==23151==    at 0x425091F: sendmsg (sendmsg.c:30)
==23151==    by 0x60591C4: WS2_send (socket.c:2628)
==23151==    by 0x60594BB: WS2_sendto (socket.c:5606)
==23151==    by 0x605FBC5: WS_send (socket.c:5521)
==23151==    by 0x4A93CF4: server_thread (http.c:2443)
==23151==    by 0x7BC77F0F: ??? (in
/home/austin/wine-valgrind/dlls/ntdll/ntdll.dll.so)
==23151==    by 0x7BC7B2D5: call_thread_func (signal_i386.c:2654)
==23151==    by 0x7BC77F01: ??? (in
/home/austin/wine-valgrind/dlls/ntdll/ntdll.dll.so)
==23151==  Address 0x4a2d031 is 4,193 bytes inside a recently re-allocated
block of size 8,000 alloc'd
==23151==    at 0x7BC483AD: notify_alloc (heap.c:260)
==23151==    by 0x7BC4BD6D: RtlReAllocateHeap (heap.c:1893)
==23151==    by 0x4A931F3: server_thread (http.c:2156)
==23151==    by 0x7BC77F0F: ??? (in
/home/austin/wine-valgrind/dlls/ntdll/ntdll.dll.so)
==23151==    by 0x7BC7B2D5: call_thread_func (signal_i386.c:2654)
==23151==    by 0x7BC77F01: ??? (in
/home/austin/wine-valgrind/dlls/ntdll/ntdll.dll.so)
==23151==  Uninitialised value was created by a client request
==23151==    at 0x7BC4831C: mark_block_uninitialized (heap.c:214)
==23151==    by 0x7BC4A643: initialize_block (heap.c:245)
==23151==    by 0x7BC4BDEE: RtlReAllocateHeap (heap.c:1915)
==23151==    by 0x4A931F3: server_thread (http.c:2156)
==23151==    by 0x7BC77F0F: ??? (in
/home/austin/wine-valgrind/dlls/ntdll/ntdll.dll.so)
==23151==    by 0x7BC7B2D5: call_thread_func (signal_i386.c:2654)
==23151==    by 0x7BC77F01: ??? (in
/home/austin/wine-valgrind/dlls/ntdll/ntdll.dll.so)
==23151==