change password will break login in imap

Some body add ${quota}M

But quota is not defined, so if password was changed passwd get incorrect value "M"

bin/v-change-mail-account-password

@@ -55,6 +55,9 @@ salt=$(generate_password "$PW_MATRIX" "8")
 md5="{MD5}$($BIN/v-generate-password-hash md5 $salt <<<$password)"
 
 if [[ "$MAIL_SYSTEM" =~ exim ]]; then
+    quota=$(grep $account $HESTIA/data/users/${user}/mail/${domain}.conf)
+    quota=$(echo $quota | awk '{ print $7 }' | sed -e "s/'//g" )
+    quota=$(echo $quota | cut -d "=" -f 2 | sed -e "s/unlimited/0/g")
     sed -i "/^$account:/d" $HOMEDIR/$user/conf/mail/$domain/passwd
     str="$account:$md5:$user:mail::$HOMEDIR/$user::userdb_quota_rule=*:storage=${quota}M"
     echo $str >> $HOMEDIR/$user/conf/mail/$domain/passwd