[mc] spell check

[Ralf Mardorf]

Is adding "--enable-aspell" required when configuring the build, or
should it build with aspell support, even without explicitly adding this
flag?

Arch does build with a python3 patch and is missing "--enable-aspell" as a build option.
$ grep source PKGBUILD -A3
source=(
  "http://ftp.midnight-commander.org/${pkgname}-${pkgver}.tar.xz"
  'mc-python3.patch'
)
$ grep configure PKGBUILD -A7
  ./configure \
    --prefix=/usr \
    --libexecdir=/usr/lib \
    --sysconfdir=/etc \
    --enable-vfs-smb \
    --with-screen=slang \
    --with-x


By the Debian rules "--enable-aspell" is added, see
https://tracker.debian.org/media/packages/m/mc/rules-34.8.28-1 .