correct function skiplist_iterator in skiplist.h

HISTORY

 
-Version 1.43  2019-12-06
+Version 1.43  2019-12-24
   * replace function call system to getExecResult,
     system is the deprecated function in iOS 11
+  * correct function skiplist_iterator in skiplist.h
 
 Version 1.42  2019-12-03
   * add function get_gzip_command_filename

src/skiplist.h

@@ -186,13 +186,16 @@ static inline void skiplist_iterator(Skiplist *sl, SkiplistIterator *iterator)
     iterator->type = sl->type;
     switch (sl->type) {
         case SKIPLIST_TYPE_FLAT:
-            return flat_skiplist_iterator(&sl->u.flat, &iterator->u.flat);
+            flat_skiplist_iterator(&sl->u.flat, &iterator->u.flat);
+            break;
         case SKIPLIST_TYPE_MULTI:
-            return multi_skiplist_iterator(&sl->u.multi, &iterator->u.multi);
+            multi_skiplist_iterator(&sl->u.multi, &iterator->u.multi);
+            break;
         case SKIPLIST_TYPE_SET:
-            return skiplist_set_iterator(&sl->u.set, &iterator->u.set);
+            skiplist_set_iterator(&sl->u.set, &iterator->u.set);
+            break;
         default:
-            return EINVAL;
+            break;
     }
 }