Fix DDNS provider

src/freedombone

       255) exit 0;;
   esac
 
+  data=$(tempfile 2>/dev/null)
+  trap "rm -f $data" 0 1 2 5 15
   dialog --backtitle "Freedombone Configuration" \
       --radiolist "Choose Dynamic DNS provider:" 15 40 14 \
       1 dyndns off \
       11 dynsip off \
       12 sitelutions off \
       13 dnsexit off \
-      14 changeip off
+      14 changeip off 2> $data
   sel=$?
   case $sel in
+      1) exit 0;;
+      255) exit 0;;
+  esac
+  case $(cat $data) in
       1) DDNS_PROVIDER="default@dyndns.org";;
       2) DDNS_PROVIDER="default@freedns.afraid.org";;
       3) DDNS_PROVIDER="default@zoneedit.com";;