[openwrt/openwrt] lldpd: fix error "sh: XXXms: bad number"

[LEDE Commits]

robimarko pushed a commit to openwrt/openwrt.git, branch openwrt-23.05:
https://git.openwrt.org/7542e7927b6ca472ae7c2f38e1e8705c17cccb9a

commit 7542e7927b6ca472ae7c2f38e1e8705c17cccb9a
Author: Paul Donald <newtwen at gmail.com>
AuthorDate: Thu Feb 8 23:37:13 2024 +0100

    lldpd: fix error "sh: XXXms: bad number"
    
    from commit 3ce909914a12647bec52bcee0a162dd6d158a4f6
    
    The lldpd man page says that "configure lldp tx-interval" can
    specify an interval value in milliseconds by appending a "ms" suffix to
    the figure. Thus mandating string handling, and not integer comparison.
    
    Tested on 22.03.5
    
    Signed-off-by: Paul Donald <newtwen at gmail.com>
    (cherry picked from commit 79ee4cb0397eb9eae34369e33d66b5a1d837a652)
    Link: https://github.com/openwrt/openwrt/pull/15299
    Signed-off-by: Robert Marko <robimarko at gmail.com>
---
 package/network/services/lldpd/files/lldpd.init | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package/network/services/lldpd/files/lldpd.init b/package/network/services/lldpd/files/lldpd.init
index e13128e2d6..97c572d347 100644
--- a/package/network/services/lldpd/files/lldpd.init
+++ b/package/network/services/lldpd/files/lldpd.init
@@ -148,7 +148,7 @@ write_lldpd_conf()
 	[ -n "$lldp_agenttype" ] && echo "configure lldp agent-type $lldp_agenttype" >> "$LLDPD_CONF"
 	[ -n "$lldp_portidsubtype" ] && echo "configure lldp portidsubtype $lldp_portidsubtype" >> "$LLDPD_CONF"
 	[ -n "$lldp_platform" ] && echo "configure system platform" "\"$lldp_platform\"" >> "$LLDPD_CONF"
-	[ $lldp_tx_interval -gt 0 ] && echo "configure lldp tx-interval $lldp_tx_interval" >> "$LLDPD_CONF"
+	[ -n $lldp_tx_interval ] && echo "configure lldp tx-interval $lldp_tx_interval" >> "$LLDPD_CONF"
 	[ $lldp_tx_hold -gt 0 ] && echo "configure lldp tx-hold $lldp_tx_hold" >> "$LLDPD_CONF"
 
 	# Since lldpd's sysconfdir is /tmp, we'll symlink /etc/lldpd.d to /tmp/$LLDPD_CONFS_DIR