Build fails with `CURL_DISABLE_DOH` defined.

[wyattoday]

I did this

Defined CURL_DISABLE_DOH, built libCurl as usual. Build failed with:

\lib\url.c(406): error C2039: 'doh': is not a member of 'SingleRequest'
\lib\urldata.h(560): note: see declaration of 'SingleRequest'
\lib\url.c(406): error C2198: 'Curl_cfree': too few arguments for call
\lib\url.c(407): error C2039: 'doh': is not a member of 'SingleRequest'
\lib\urldata.h(560): note: see declaration of 'SingleRequest'
\lib\url.c(407): error C2198: 'Curl_cfree': too few arguments for call
\lib\url.c(408): error C2039: 'doh': is not a member of 'SingleRequest'
\lib\urldata.h(560): note: see declaration of 'SingleRequest'
\lib\url.c(408): error C2198: 'curl_slist_free_all': too few arguments for call
\lib\url.c(1990): error C2039: 'doh': is not a member of 'SingleRequest'
\lib\urldata.h(560): note: see declaration of 'SingleRequest'
\lib\url.c(1990): error C2198: 'Curl_close': too few arguments for call
\lib\url.c(1991): error C2039: 'doh': is not a member of 'SingleRequest'
\lib\urldata.h(560): note: see declaration of 'SingleRequest'
\lib\url.c(1991): error C2198: 'Curl_close': too few arguments for call

I expected the following

Successful builds.

curl/libcurl version

7.67.0

operating system

Windows 10 (but we make the same defines on unix variants, so it will fail there as well).

Solution?

I'll make a pull request in a second, but it's simple #ifndef CURL_DISABLE_DOH