Fix code so it actually pads a length to an 8 byte boundary.

svn path=/trunk/; revision=30406

1 files changed, 1 insertions, 1 deletions

diff --git a/epan/dissectors/packet-6lowpan.c b/epan/dissectors/packet-6lowpan.c
index 1d8101a4ca..166e608f75 100644
--- a/epan/dissectors/packet-6lowpan.c
+++ b/epan/dissectors/packet-6lowpan.c
@@ -1516,7 +1516,7 @@ dissect_6lowpan_iphc_nhc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gi
 
         /* Compute the length of the extension header padded to an 8-byte alignment. */
         length = sizeof(struct ip6_ext) + ext_len;
-        length += ((length + 7) & 0x7);
+        length = (length + 7) & ~0x7;
 
         /* Create the next header structure for the IPv6 extension header. */
         nhdr = ep_alloc0(sizeof(struct lowpan_nhdr) + sizeof(struct ip6_ext) + length);