Fix fetching of affected tables when mapnik tokens are used

We'll replace !bbox! with an empty box and !pixel_width! and
!pixel_height! with 1 before passing the query to CDB_QueryTable

lib/cartodb/server_options.js

@@ -105,7 +105,14 @@ module.exports = function(){
 
     me.affectedTables = function (username, api_key, sql, callback) {
 
-      var sql = 'SELECT CDB_QueryTables($windshaft$' + sql + '$windshaft$)';
+      // Replace mapnik tokens
+      sql = sql.replace(RegExp('!bbox!', 'g'), 'ST_MakeEnvelope(0,0,0,0)')
+               .replace(RegExp('!pixel_width!', 'g'), '1')
+               .replace(RegExp('!pixel_height!', 'g'), '1')
+            ;
+
+      // Pass to CDB_QueryTables
+      sql = 'SELECT CDB_QueryTables($windshaft$' + sql + '$windshaft$)';
 
       // call sql api
       me.sqlQuery(username, api_key, sql, function(err, rows){