Add categories sanitizer to autocomplete

sanitiser/autocomplete.js

@@ -12,6 +12,7 @@ var sanitizeAll = require('../sanitiser/sanitizeAll'),
       sources_and_layers: require('../sanitiser/_sources_and_layers'),
       private: require('../sanitiser/_flag_bool')('private', false),
       geo_autocomplete: require('../sanitiser/_geo_autocomplete'),
+      categories: require('../sanitiser/_categories')
     };
 
 var sanitize = function(req, cb) { sanitizeAll(req, sanitizers, cb); };

test/unit/sanitiser/autocomplete.js

@@ -6,7 +6,7 @@ module.exports.tests.sanitisers = function(test, common) {
   test('check sanitiser list', function (t) {
     var expected = [
       'singleScalarParameters', 'text', 'tokenizer', 'size', 'layers', 'sources',
-      'sources_and_layers', 'private', 'geo_autocomplete'
+      'sources_and_layers', 'private', 'geo_autocomplete', 'categories'
     ];
     t.deepEqual(Object.keys(autocomplete.sanitiser_list), expected);
     t.end();