Proposal and patch: Allow whitespace in md constraints

[Jeffrey A Law]

  In message < Pine.BSF.4.10.10002141649380.29802-100000@dair.pair.com >you write
:
  > On Mon, 14 Feb 2000, Michael Meissner wrote:
  > > On Mon, Feb 14, 2000 at 03:48:48PM -0500, Hans-Peter Nilsson wrote:
  > > > Ok, then.  Is it ok to commit, replacing strip_whitespace with your
  > > > implementation?  I'll add you to the ChangeLog entry, if you don't mind
  > .
  > > 
  > > Sure go ahead and commit it.
  > 
  > Sorry to pest you again.  I didn't commit, since I got const-discarded
  > compilation warnings, and I noticed there was a NULL-check right *after*
  > the "stripping" in the original patch.
  > 
  > I believe I have to ask for renewed permission to check in this.  Here's
  > the updated part, the rest is as approved:
When testing a pointer against null I would recommend

blah != NULL

instead of 

blah != 0

Otherwise it seems fine to me.
jeff