Fix ciphersuites dependencies on MD5 and SHA1
diff --git a/library/cipher_wrap.c b/library/cipher_wrap.c
index 342923d..7466b95 100644
--- a/library/cipher_wrap.c
+++ b/library/cipher_wrap.c
@@ -1178,7 +1178,7 @@
 #endif /* POLARSSL_DES_C */
 
 #if defined(POLARSSL_CIPHER_NULL_CIPHER)
-    { POLARSSL_CIPHER_NULL,                 &null_info },
+    { POLARSSL_CIPHER_NULL,                 &null_cipher_info },
 #endif /* POLARSSL_CIPHER_NULL_CIPHER */
 
     { 0, NULL }