pnp need perf-data with always same order

pnp draws nasty graphs until the order of the perf-data is always the same. Fixed by adding a missing sort.

plugins/check_snmp_int.pl

@@ -483,7 +483,7 @@ sub check_options {
 # and put the oid to query in an array
 
 verb("Filter : $o_descr");
-foreach my $key ( keys %$resultat) {
+foreach my $key (sort { $$resultat{$a} cmp $$resultat{$b} } keys %$resultat) {
    verb("OID : $key, Desc : $$resultat{$key}");
    # test by regexp or exact match
    my $test = defined($o_noreg)