calculateInRange always returns false, so the layers can never be displayed
(due to recent code): Fix calculateInRange by setting min/max res. r=tschaub,
(Closes#1457)
git-svn-id: http://svn.openlayers.org/trunk/openlayers@6572 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf