for ((i=${#source[@]}; i>0; i--)); do
  if [ "${source[${i}]}" = "http://www.bay12games.com/dwarves/df_${_pkgver}_linux.tar.bz2" ]; then
    break;
  fi
done
source[${i}]="http://www.bay12games.com/dwarves/df_${_pkgver}_linux32.tar.bz2"
sha256sums[${i}]='542b29e4aae6ba71ae2e56e176c041ec0f6471e9c299db98695d4b0ddfd96ac9'