coverity choked at two !tty checks, in places where tty can never be NULL.
Since it removes some code we should remove these checks.  (Coverity ids
#763,#762)

[akpm@osdl.org: even cleaner!]
Signed-off-by: NEric Sesterhenn <snakebyte@gmx.de>
Acked-by: NAlan Cox <alan@redhat.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>