dspatcher: return the new ds dest for add_dest2list()

- easier to access the fields of the new record afterwards

(cherry picked from commit cff6f9fd7051f4b8ac6e4fc59257c239cb32f21d)

src/modules/dispatcher/dispatch.c

@@ -713,7 +713,7 @@ err:
 /**
  *
  */
-int add_dest2list(int id, str uri, int flags, int priority, str *attrs,
+ds_dest_t *add_dest2list(int id, str uri, int flags, int priority, str *attrs,
 		int list_idx, int *setn, int dload, ds_latency_stats_t *latency_stats)
 {
 	ds_dest_t *dp = NULL;
@@ -722,8 +722,9 @@ int add_dest2list(int id, str uri, int flags, int priority, str *attrs,
 	ds_dest_t *dp1 = NULL;
 
 	dp = pack_dest(uri, flags, priority, attrs, dload);
-	if(!dp)
-		goto err;
+	if(!dp) {
+		goto error;
+	}
 
 	if(latency_stats != NULL) {
 		dp->latency_stats.stdev = latency_stats->stdev;
@@ -739,7 +740,7 @@ int add_dest2list(int id, str uri, int flags, int priority, str *attrs,
 	sp = ds_avl_insert(&ds_lists[list_idx], id, setn);
 	if(!sp) {
 		LM_ERR("no more memory.\n");
-		goto err;
+		goto error;
 	}
 	sp->nr++;
 
@@ -766,8 +767,8 @@ int add_dest2list(int id, str uri, int flags, int priority, str *attrs,
 
 	LM_DBG("dest [%d/%d] <%.*s>\n", sp->id, sp->nr, dp->uri.len, dp->uri.s);
 
-	return 0;
-err:
+	return dp;
+error:
 	if(dp != NULL) {
 		if(dp->uri.s != NULL)
 			shm_free(dp->uri.s);
@@ -776,7 +777,7 @@ err:
 		shm_free(dp);
 	}
 
-	return -1;
+	return NULL;
 }
 
 
@@ -1112,7 +1113,7 @@ int ds_load_list(char *lfile)
 		}
 		if(add_dest2list(id, uri, flags, priority, &attrs, *ds_next_idx, &setn,
 				   0, latency_stats)
-				!= 0) {
+				== NULL) {
 			LM_WARN("unable to add destination %.*s to set %d -- skipping\n",
 					uri.len, uri.s, id);
 			if(ds_load_mode == 1) {
@@ -1372,7 +1373,7 @@ int ds_load_db(void)
 		}
 		if(add_dest2list(id, uri, flags, priority, &attrs, *ds_next_idx, &setn,
 				   0, latency_stats)
-				!= 0) {
+				== NULL) {
 			dest_errs++;
 			LM_WARN("unable to add destination %.*s to set %d -- skipping\n",
 					uri.len, uri.s, id);
@@ -2870,7 +2871,7 @@ void ds_add_dest_cb(ds_set_t *node, int i, void *arg)
 			   node->dlist[i].priority, &node->dlist[i].attrs.body,
 			   *ds_next_idx, &setn, node->dlist[i].dload,
 			   &node->dlist[i].latency_stats)
-			!= 0) {
+			== NULL) {
 		LM_WARN("failed to add destination in group %d - %.*s\n", node->id,
 				node->dlist[i].uri.len, node->dlist[i].uri.s);
 	}
@@ -2893,7 +2894,7 @@ int ds_add_dst(int group, str *address, int flags, int priority, str *attrs)
 	// add new destination
 	if(add_dest2list(group, *address, flags, priority, attrs, *ds_next_idx,
 			   &setn, 0, NULL)
-			!= 0) {
+			== NULL) {
 		LM_WARN("unable to add destination %.*s to set %d", address->len,
 				address->s, group);
 		if(ds_load_mode == 1) {
@@ -2934,7 +2935,7 @@ void ds_filter_dest_cb(ds_set_t *node, int i, void *arg)
 			   node->dlist[i].priority, &node->dlist[i].attrs.body,
 			   *ds_next_idx, filter_arg->setn, node->dlist[i].dload,
 			   &node->dlist[i].latency_stats)
-			!= 0) {
+			== NULL) {
 		LM_WARN("failed to add destination in group %d - %.*s\n", node->id,
 				node->dlist[i].uri.len, node->dlist[i].uri.s);
 	}