TAKE - fix argument parsing in remount path

[Steve Lord <lord@xxxxxxx>]

It seems there is not always an argument string to parse, so
make the xfs argument parser not attempt to parse the null
string. Fix from Amit D. Chaudhary at Brocade.

Steve

Date:  Tue Dec 18 06:53:55 PST 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:108670a
linux/fs/xfs/linux/xfs_super.c - 1.149
        - If there are no arguments to parse, do not parse them.