Problem parsing date on parseDate function (when date is a string)

[lbortoli]

I think I noticed the error:

c3_chart_internal_fn.parseDate = function (date) {
var $$ = this, parsedDate;
if (date instanceof Date) {
parsedDate = date;
} else if (typeof date === 'number' && !isNaN(date)) {// fixed wrong validation
parsedDate = new Date(+date);
} else {
parsedDate = $.dataTimeFormat($.config.data_xFormat).parse(date);
}
if (!parsedDate || isNaN(+parsedDate)) {
window.console.error("Failed to parse x '" + date + "' to Date object");
}
return parsedDate;
};

The issue was on the validation
if (typeof date === 'number' || !isNaN(date))

it should be
if (typeof date === 'number' && !isNaN(date))

[michaelrodov]

fix commited