From 84383a3275e1c1fb916aa693be9a9a2a024b5742 Mon Sep 17 00:00:00 2001
From: Murilo Soares Pereira <murilo.soares3@gmail.com>
Date: Sun, 4 Apr 2010 00:51:14 -0300
Subject: [PATCH] Fixed length().

---
 lib/stack.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/stack.c b/lib/stack.c
index 53a9aaa..deba919 100644
--- a/lib/stack.c
+++ b/lib/stack.c
@@ -19,12 +19,14 @@ bool empty(struct stack *stack) {
 }
 
 int length(struct stack *stack) {
+  struct stack *iterator = stack;
   int length = 0;
 
   if (!empty(stack)) {
     length = 1;
-    while (stack->next != NULL) {
+    while (iterator->next != NULL) {
       length++;
+      iterator = iterator->next;
     }
   }