Moved to the default array instead of issets for property map.
Moved to the default array instead of issets for property map.

wp-papi/papi,wp-papi/papi,isotopsweden/wp-papi,nlemoine/papi,rasmusbe/papi,wp-papi/papi,ekandreas/papi,isotopsweden/wp-papi,ekandreas/papi,nlemoine/papi,isotopsweden/wp-papi,rasmusbe/papi,nlemoine/papi,rasmusbe/papi,ekandreas/papi