Add wipe option for luks

archfi

@@ -557,11 +557,12 @@ formatdevice(){
       sel=$(whiptail --backtitle "$apptitle" --title "Wipe device" --menu "Wipe device (recommended) ?" --no-button="Ignore" 0 0 0 \
         "${options[@]}" \
         3>&1 1>&2 2>&3)
-        clear
+      if [ "$?" = "0" ]; then
         case $sel in
           normal) dd if=/dev/zero of=/dev/mapper/$1 & PID=$! &>/dev/null;;
           fast) dd if=/dev/zero of=/dev/mapper/$1 bs=30M & PID=$! &>/dev/null;;
         esac
+        clear
         sleep 1
         while kill -USR1 $PID &>/dev/null
         do