fix a svn-1.6 issue

--HG--
branch : 1.0.x

CHANGELOG

@@ -1,6 +1,9 @@
 Changes between 1.0.0b8 and 1.0.0b9
 =====================================
 
+* fix svn-1.6 compat issue with py.path.svnwc().versioned()
+  (thanks Wouter Vanden Hove)
+
 * dist-testing: properly handle test items that get locally 
   collected but cannot be collected on the remote side - often 
   due to platform/dependency reasons

py/path/svn/wccommand.py

@@ -454,6 +454,8 @@ recursively. """
             except py.process.cmdexec.Error, e:
                 if e.err.find('is not a working copy')!=-1:
                     return False
+                if e.err.lower().find('not a versioned resource') != -1:
+                    return False
                 raise
             else:
                 return True