*: use llist_pop for traverse-and-free list operation

function                                             old     new   delta
append_file_list_to_list                             109     111      +2
udhcpc_main                                         2414    2413      -1
run_parts_main                                       325     324      -1
od_main                                             2324    2323      -1
getopt_main                                          709     707      -2
env_main                                             253     251      -2
sed_main                                             659     656      -3
ps_main                                              522     519      -3
traceroute_main                                     3960    3954      -6
sort_main                                            844     838      -6
diff_main                                            866     858      -8
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/10 up/down: 2/-33)            Total: -31 bytes

1 files changed, 2 insertions, 8 deletions

diff --git a/networking/traceroute.c b/networking/traceroute.c
index e9df27559..6a5373469 100644
--- a/networking/traceroute.c
+++ b/networking/traceroute.c
@@ -1001,17 +1001,11 @@ int traceroute_main(int argc, char **argv)
 
 #if ENABLE_FEATURE_TRACEROUTE_SOURCE_ROUTE
         if (source_route_list) {
-                llist_t *l_sr;
-
-                l_sr = source_route_list;
-                while (l_sr) {
+                while (source_route_list) {
                         if (lsrr >= NGATEWAYS)
                                 bb_error_msg_and_die("no more than %d gateways", NGATEWAYS);
-                        getaddr(gwlist + lsrr, l_sr->data);
+                        getaddr(gwlist + lsrr, llist_pop(&source_route_list));
                         ++lsrr;
-                        l_sr = l_sr->link;
-                        free(source_route_list);
-                        source_route_list = l_sr;
                 }
                 optlen = (lsrr + 1) * sizeof(gwlist[0]);
         }