Fix an out of bounds write in purple_markup_linkify.
Review Request #781 — Created June 23, 2021 and submitted
This was found by Thomas Roth <email@example.com>, Dominik Maier <firstname.lastname@example.org>, and Fabian Freyer <email@example.com>.
Compiled and ran the
purple_markup_linkify_fuzzerfrom the google oss-fuzz project to verify the fix.