--- embedaddon/iftop/stringmap.c	2012/02/21 16:57:34	1.1.1.1
+++ embedaddon/iftop/stringmap.c	2016/10/18 14:04:50	1.1.1.2
@@ -8,7 +8,7 @@
  *
  */
 
-static const char rcsid[] = "$Id: stringmap.c,v 1.1.1.1 2012/02/21 16:57:34 misho Exp $";
+static const char rcsid[] = "$Id: stringmap.c,v 1.1.1.2 2016/10/18 14:04:50 misho Exp $";
 
 
 #include <stdlib.h>
@@ -53,11 +53,11 @@ void stringmap_delete_free(stringmap S) {
 }
 
 /* stringmap_insert:
- * Insert into S an item having key k and value d. Returns an existing key
- * or NULL if it was inserted. 
+ * Insert into S an item having key k and value d. Returns a pointer to
+ * the existing item value, or NULL if a new item was created. 
  */
 item *stringmap_insert(stringmap S, const char *k, const item d) {
-    if (!S) return 0;
+    if (!S) return NULL;
     if (S->key == NULL) {
         S->key = xstrdup(k);
         S->d   = d;