curl-shim: clean up varargs
* keyserver/curl-shim.c (curl_easy_setopt) : ensure that va_end is called.
stdarg(3) says:
Each invocation of va_start() must be matched by a corresponding invocation of va_end() in the same function.
Observed by Joshua Rogers <honey@internot.info>
[dkg: rebased to STABLE-BRANCH-1-4]
- Debian-Bug-Id: ##773475
- Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>