function checkEntryCRC32(zipEntry) {
    return new external.Promise(function (resolve, reject) {
        var worker = zipEntry.decompressed.getContentWorker().pipe(new Crc32Probe());
        worker.on("error", function (e) {
            reject(e);
        })
        .on("end", function () {
            if (worker.streamInfo.crc32 !== zipEntry.decompressed.crc32) {
                reject(new Error("Corrupted zip : CRC32 mismatch"));
            } else {
                resolve();
            }
        })
        .resume();
    });
}
Check the CRC32 of an entry.
@param {ZipEntry} zipEntry the zip entry to check.
@return {Promise} the result.