Move the fuzzers from libpurples/tests to libpurple/fuzzers and cleanup a bunch of little things

Review Request #782 — Created June 25, 2021 and submitted — Latest diff uploaded

Information

pidgin/pidgin
release-2.x.y
a21b67e2e1c4

Reviewers

Move the fuzzers from libpurples/tests to libpurple/fuzzers and cleanup a bunch of little things

Ran the fuzzers locally