Update to new version 0.8.16 from BRCM

Sync with main tree commit b8349523e460493fa0b4de36c689595109e45e91
Author: Neeraj Kumar Garg <neerajkg@broadcom.com>
Date:   Tue Dec 27 23:21:45 2011 +0200
    P2P: Reject p2p_group_add if forced frequency is not acceptable

Change-Id: Icb4541a371b05c270e80440d7a7fdea7f33ff61e
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
diff --git a/src/crypto/dh_group5.c b/src/crypto/dh_group5.c
index 8c475bf..2a67d99 100644
--- a/src/crypto/dh_group5.c
+++ b/src/crypto/dh_group5.c
@@ -22,7 +22,7 @@
 void * dh5_init(struct wpabuf **priv, struct wpabuf **publ)
 {
 	*publ = dh_init(dh_groups_get(5), priv);
-	if (*publ == 0)
+	if (*publ == NULL)
 		return NULL;
 	return (void *) 1;
 }