Wrong message when checking an array against an object type schema

[oferei]

when running this code:
var schema = {type: 'object'};
amanda.validate([], schema, function(error) {console.log('error:', error);});
an error is returned with the wrong message.
actual:
'The '' property must be a/an 'object'. The type of the property is 'object''
expected:
'The '' property must be a/an 'object'. The type of the property is 'array''