Pullup the following revisions, requested by maxv in ticket #148:

sys/compat/svr4/svr4_stat.c                    1.70
sys/dev/dm/dm_target_snapshot.c                1.17
sys/dev/if_ndis/if_ndis_pci.c                  1.20
sys/fs/smbfs/smbfs_smb.c                        1.45
sys/ufs/ext2fs/ext2fs_readwrite.c              1.65

Various fixes: two memory leaks, a typo, a dead compiler condition and
unused macros, respectively in if_ndis and dm, smbfs, svr4 and ext2fs.

(martin)