Removed a bug in property cache that disabled the cache if the property was null (e.g for player lookups)
Removed a bug in property cache that disabled the cache if the property was null (e.g for player lookups)

google-code-export/evennia,google-code-export/evennia,tectronics/evennia,tectronics/evennia,google-code-export/evennia,tectronics/evennia