retval doesn't initalized

If each if conditions are all fail, variable retval will under uninitlized

src/t_set.c

@@ -491,7 +491,7 @@ void srandmemberWithCountCommand(redisClient *c) {
         /* Add all the elements into the temporary dictionary. */
         si = setTypeInitIterator(set);
         while((encoding = setTypeNext(si,&ele,&llele)) != -1) {
-            int retval;
+            int retval = DICT_ERR;
 
             if (encoding == REDIS_ENCODING_INTSET) {
                 retval = dictAdd(d,createStringObjectFromLongLong(llele),NULL);