smb: client: fix potential OOB in cifs_dump_detail()

Validate SMB message with ->check_message() before calling
->calc_smb_size().

Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
Cc: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>