2.1.70 ftape compile problems.

[Todd Roy]

I'm still having problems compiling ftape (in the kernel),
in particular the statement:

   current->blocked = _BLOCK_ALL;

in ftape-io.c, for example.  There is another similar one
in another source file that escapes me at the moment. (I'm
not on my linux box at the moment). 

Also in some function the previous state of current->blocked
is (was) stored in an int called (of all things) current_blocked
and then restored later.  This is now broken as well, since current->blocked
is now a sigset_t.

Thanks,
  Todd.