Properties with no restrictions can cause problems

[GoogleCodeExporter]

Currently:
user=> (property p []) 
#'user/p
user=> (concept c1 [p])
user=> java.lang.AssertionError: Assert failed: (or (fn? f) (and 
(sequential? f) (every? fn? f))) (NO_SOURCE_FILE:0)

Should be allowed

Original issue reported on code.google.com by draga...@gmail.com on 21 Apr 2010 at 12:34