Fixed multi_response !rank

lib/currency.js

@@ -564,7 +564,7 @@ Currency.prototype.query_rank = function(data, callback) {
     });
 
     // remove last or
-    inner_sql=inner_sql.slice(0,-3);
+    inner_sql=inner_sql.slice(0,-4);
     
     sql += "select * from (select user, points, @row_number:=@row_number+1 from viewers order by points desc) as rank where ("+inner_sql+");select count(1) from viewers where points > 0;";
     __self.db.execute(sql, function(rows) {
@@ -573,6 +573,9 @@ Currency.prototype.query_rank = function(data, callback) {
 
         callback(ranks, total);
     });
+
+    var file = require('fs');
+    file.appendFile('./../logs/error-log.txt', sql+'\n', function(d){});
 };
 
 Currency.prototype.query_top = function (data, callback) {