fix(net): Fix "Payload length does not match range requested bytes" when using open end (#8651)

Author: avelad

lib/net/http_fetch_plugin.js

@@ -220,7 +220,7 @@ shaka.net.HttpFetchPlugin = class {
 
       if (request.headers['Range']) {
         const range = request.headers['Range'].replace('bytes=', '').split('-')
-            .map((r) => parseInt(r, 10));
+            .filter((r) => r).map((r) => parseInt(r, 10));
         if (range.length == 2 &&
             arrayBuffer.byteLength != (range[1] - range[0] + 1)) {
           shaka.log.alwaysWarn(