Fix a crash when you try to svnlook into a non-existant repository.
Fix a crash when you try to svnlook into a non-existant repository.

Reported By:  Blair Zajac <blair@orcaware.com>

* subversion/svnlook/main.c
  (main): initialize c.fs to NULL so we can check that it's valid before we 
   try to close it.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion