test/regress_dns: fix compilation warnings (-Wmissing-field-initializers/for) I don't have an error for loop because gcc5 have --std=gnu11 by default. We need some options-consistency for all versions/compilers and build systems to avoid such patches. Fixes: https://travis-ci.org/libevent/libevent/jobs/84403473 Fixes: https://travis-ci.org/libevent/libevent/builds/84403463