devel/cdialog: Update to 1.3-20200327

This fixes ugly black bars that show up with cdialog 1.3-20180621

PR: 242613
Submitted by: takefu@airport.fm
Reported by: Serge Volkov <sv@ulstu.ru>
Approved by: tcberner (ports)
Approved by: Josmar <jcpierri@gmail.com> (maintainer)