Check password length

src/freedombone-pass

 MY_BACKUP_KEY_ID=
 CURR_USERNAME=
 CURR_APP=
-CURR_PASSWORD=
+CURR_PASSWORD=""
 
 function get_backup_key_id {
     MY_BACKUP_KEY_ID=$(gpg --list-keys "(backup key)" | \
     exit 3
 fi
 
-if [ ! $CURR_PASSWORD ]; then
+if [ {#CURR_PASSWORD} -eq 0 ]; then
     # retrieve password
     if [ ! -f ~/.passwords/$CURR_USER/$CURR_APP ]; then
         echo ""