dnsmasq: fix dhcp_option usage warning

Don't display unnecessary dhcp_option usage warning in case
dhcp_option is empty

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

diff --git a/package/network/services/dnsmasq/files/dnsmasq.init b/package/network/services/dnsmasq/files/dnsmasq.init
index 4291df2544bafe10947bd2155ee9ac7f895a21e6..e6ba7322e3dc63fc2c934e9ab444f359747822f2 100644 (file)
--- a/package/network/services/dnsmasq/files/dnsmasq.init
+++ b/package/network/services/dnsmasq/files/dnsmasq.init
@@ -560,9 +560,10 @@ dhcp_option_add() {
        if [ -n "$list_len" ]; then
                config_list_foreach "$cfg" dhcp_option dhcp_option_append "$networkid" "$force"
        else
-               echo "Warning: the 'option dhcp_option' syntax is deprecated, use 'list dhcp_option'" >&2
                config_get dhcp_option "$cfg" dhcp_option
 
+               [ -n "$dhcp_option" ] && echo "Warning: the 'option dhcp_option' syntax is deprecated, use 'list dhcp_option'" >&2
+
                local option
                for option in $dhcp_option; do
                        dhcp_option_append "$option" "$networkid" "$force"