shlwapi/tests: Fix stream test failures under some win2000 versions.

dlls/shlwapi/tests/istream.c

@@ -222,8 +222,8 @@ static void test_stream_read_write(IStream *stream, DWORD mode)
     ret = stream->lpVtbl->Read(stream, buf, 2, &count);
     if (written != 0)
     {
-        ok(ret == S_OK, "IStream_Read error %#x (access %#x, written %u)\n", ret, mode, written);
-        if (mode == STGM_WRITE || mode == STGM_READWRITE)
+        ok(ret == S_OK || broken(ret == S_FALSE) /* win2000 */, "IStream_Read error %#x (access %#x, written %u)\n", ret, mode, written);
+        if (ret == S_OK && (mode == STGM_WRITE || mode == STGM_READWRITE))
         {
             ok(count == 2, "expected 2, got %u\n", count);
             ok(buf[0] == 0x5e && buf[1] == 0xa7, "expected 5ea7, got %02x%02x\n", buf[0], buf[1]);