[PATCH] Fix the fdtable freeing in the case of vmalloced fdset/arrays

Noted by David Miller:

  "The bug is that free_fd_array() takes a "num" argument, but when
   calling it from __free_fdtable() we're instead passing in the size in
   bytes (ie.  "num * sizeof(struct file *)")."

Yes it is a bug. I think I messed it up while merging newer
changes with an older version where I was using size in bytes
to optimize.

Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>