net-mgmt/net-snmp: Fix scenario where a user does not have a config in the default location

PR:		280284
Reported by:	gebhart@secnetix.de

net-mgmt/net-snmp/Makefile

@@ -1,7 +1,7 @@
 PORTNAME=	snmp
 PORTVERSION=	5.9.4
 PORTEPOCH=	1
-PORTREVISION=	5
+PORTREVISION=	6
 CATEGORIES=	net-mgmt
 MASTER_SITES=	SF/net-${PORTNAME}/net-${PORTNAME}/${PORTVERSION} \
 		ZI

net-mgmt/net-snmp/files/snmpd.in

@@ -77,7 +77,10 @@ net_snmpd_precmd() {
 	done
 
 	# -c does not override the default config file.
+	# if it exists, sanity check
+	if [ -f %%PREFIX%%/share/snmp/snmpd.conf ]; then
 		check_conffile %%PREFIX%%/share/snmp/snmpd.conf
+	fi
 	for conffile in ${snmpd_conffile}; do
 		check_conffile ${conffile}
 		if [ -f "${conffile}" -a -s "${conffile}" ]; then