Fix in handling of "sync specifier in NewHttpRequest

Author: linev

scripts/JSRootCore.js

@@ -861,7 +861,7 @@
       if (!kind) kind = "buf";
 
       var pthis = this, method = "GET", async = true, p = kind.indexOf(";sync");
-      if (p>0) { kind.substr(0,p); async = false; }
+      if (p>0) { kind = kind.substr(0,p); async = false; }
       if (kind === "head") method = "HEAD"; else
       if ((kind === "post") || (kind === "multi") || (kind === "posttext")) method = "POST";