TAKE - fix unresolved symbol in dmapi

[Dean Roehrich <roehrich@xxxxxxxxxxxxxxxxxxxxxx>]

fix unresolved symbol in dmapi, around a switch on an loff_t.  I dunno,
but going with 'if' instead makes it go away.

Modid:  2.4.0-test1-xfs:slinx:73408a
Date:  Thu Aug 31 12:08:39 PDT 2000
Workarea:  clink.americas.sgi.com:/data/clink/a/roehrich/2.4.0-test1-xfs2
SPRs closed:  NONE
Severity:  Minor
Modtype:  Bugfix
Test Description:  
built and loaded the module
Keywords:  NONE
Requested reviewer(s):  
Author:  roehrich

The following file(s) were checked into:
  bonnie.engr.sgi.com:/isms/slinx/2.4.0-test1-xfs

linux/fs/xfs/dmapi/dmapi_sysent.c - 1.3
        - get around a runtime link error