jsgi/rest-store.js: wrong content-range header value returned when store is empty

[websoftix]

I discovered it while working with a dgrid that uses the Pagination extension, a JsonRest store and on server side a mysql-store on an empty table.

The returned header is:
content-range: items 0--1/*

The observed effect is that dgrid displays on footer "Nan - Nan of NaN results".

The code that creates the header is on lines 117 - 118 of persvr/pintura/jsgi/rest-store.js:

var end = start + (responseValue.length || 0) - 1;
headers["content-range"] = "items " + start + '-' + end + '/' + (count || '*');

At first I though is because on line 117, when start is 0 and responseValue.length is also 0 the result in end will be -1. Even though end should be 0 it didn't caused the dgrid problem.

The problem is the * returned as the count value on 118 line because in dojo/store/JsonRest.js at line 220

return range && (range = range.match(/\/(.*)/)) && +range[1];

it is returned +(the-count-value) and +('*') is Nan.

I tested with Chrome 36 and Firefox 30 and the dgrid & dojo are last code from master.

My quick solution was to replace (count || '*') with (count || '0') in the line 117 but I'm not sure how correct that is.

Virgil