Modify the X509 V3 extension lookup code.

[oweals/openssl.git] / crypto / stack / stack.h

diff --git a/crypto/stack/stack.h b/crypto/stack/stack.h
index 0f825cc0c4a69a3340ad72b7f11d5abdf1a5229a..a615d9b4c9471d617235f3befac4c6f9ead16ca5 100644 (file)
--- a/crypto/stack/stack.h
+++ b/crypto/stack/stack.h
@@ -76,8 +76,8 @@ typedef struct stack_st
 
 #define sk_new_null()  sk_new(NULL)
 
-#define M_sk_num(sk)           ((sk)->num)
-#define M_sk_value(sk,n)       ((sk)->data[n])
+#define M_sk_num(sk)           ((sk) ? (sk)->num:-1)
+#define M_sk_value(sk,n)       ((sk) ? (sk)->data[n] : NULL)
 
 int sk_num(STACK *);
 char *sk_value(STACK *, int);