From d6aba8cb680498ca81668965a52e8b254db17f79 Mon Sep 17 00:00:00 2001
From: tmeissner <programming@goodcleanfun.de>
Date: Sat, 16 May 2015 22:54:03 +0200
Subject: [PATCH] return value of realloc now written in tmp variable for
 proper handling of realloc errors

---
 21st_century_c/chapter11/dict.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/21st_century_c/chapter11/dict.c b/21st_century_c/chapter11/dict.c
index aa43c97..cd912d3 100644
--- a/21st_century_c/chapter11/dict.c
+++ b/21st_century_c/chapter11/dict.c
@@ -28,8 +28,10 @@ dictionary *dictionary_new(void) {
 static void dictionary_add_keyval(dictionary *in, keyval *kv) {
 
   in->length++;
-  in->pairs = realloc(in->pairs, sizeof(keyval*) * in->length);
-  if(in->pairs != NULL) {
+  keyval **tmp = realloc(in->pairs, sizeof(keyval*) * in->length);
+  if(tmp != NULL) {
+    in->pairs = tmp;
+    tmp = NULL;
     in->pairs[in->length-1] = kv;
   } else {
     fprintf(stderr, "Out of memory.\n");