TAKE - small code cleanup in fs/buffer.c

[Steve Lord <lord@xxxxxxx>]

Date:  Tue Jun 19 15:44:03 PDT 2001
Workarea:  jen.americas.sgi.com:/src/lord/xfs-linux.2.4

The following file(s) were checked into:
  bonnie.engr.sgi.com:/isms/slinx/2.4.x-xfs


Modid:  2.4.x-xfs:slinx:97223a
linux/fs/buffer.c - 1.68
        - Change a return zero into a BUG call, if we call write_buffer
          and there is no page then we need to do something, we cannot
          just return. This is a code path which cannot happen in theory....