Fix bug #7122 - Reading a large browselist fails (server returns invalid values in...

Fix bug #7122 - Reading a large browselist fails (server returns invalid values in subsequent SMBtrans replies)

There are two problems:

1). The server is off-by-one in the end of buffer space test.
2). The server returns 0 in the totaldata (smb_vwv1) and totalparams (smb_vwv0)
fields in the second and subsequent SMBtrans replies.

This patch fixes both.

Jeremy.
(similar to commit b07a14dc37d2899f662e1cf87064f99c0bd10b25)
Signed-off-by: Stefan Metzmacher <metze@samba.org>
(cherry picked from commit de658f95ea12d4c532f309634b9aedb09c5e4d1d)