installpkg.sh (tahpup) LN# 82-117-warn if intalling to /mnt/

# 6sep10 shinobar: installing files under /mnt is danger #LN# 82-117 of /usr/local/petget/installpkg.sh (tahrpup) - http://www.pearltrees.com/s243a/installpkg-sh-usr-local-petget/id20402080/item224090338
install_path_check() {
  FILELIST="/root/.packages/${DLPKG_NAME}.files"
  [ -s "$FILELIST" ] || return 0 #120126 noryb009: typo
  grep -q '^/mnt' "$FILELIST" || return 0
  MNTDIRS=$(cat "$FILELIST" | grep '^/mnt/.*/$' | cut -d'/' -f1-3  | tail -n 1)
  LANG=$LANG_USER
  MSG1=$(gettext "This package will install files under")
  MSG2=$(gettext "It can be dangerous to install files under '/mnt' because it depends on the profile of installation.")
  MSG3=""
  if grep -q '^/mnt/home' "$FILELIST"; then
    if [ $PUPMODE -eq 5 ]; then
      MSG3=$(gettext "You are running Puppy without 'pupsave', and '/mnt/home' does not exist. In this case, you can use the RAM for this space, but strongly recommended to shutdown now to create 'pupsave' BEFORE installing these packages.")
      MSG3="$MSG3\\n$(gettext "NOTE: You can install this package for a tentative use, then do NOT make 'pupsave' with this package installed.")"
    fi
    DIRECTSAVEPATH=""
  fi
  # dialog
  export DIALOG="<window title=\"$T_title\" icon-name=\"gtk-dialog-warning\">
  <vbox>
  <text use-markup=\"true\"><label>\"$MSG1: <b>$MNTDIRS</b>\"</label></text>
  <text><input>echo -en \"$MSG2 $MSG3\"</input></text>
  <text><label>$(gettext "Click 'Cancel' not to install(recommended). Or click 'Install' if you like to proceed.")</label></text>
  <hbox>
  <button cancel></button>
  <button><input file stock=\"gtk-apply\"></input><label>$(gettext 'Install')</label><action type=\"exit\">INSTALL</action></button>
  </hbox>
  </vbox>
  </window>"
  RETPARAMS=`gtkdialog -p DIALOG` || echo "$DIALOG" >&2
  eval "$RETPARAMS"
  LANG=C
  [ "$EXIT" = "INSTALL" ]  && return 0
  rm -f "$FILELIST"
  exit 1
}