Fix in JSROOT.clone() method

Correctly clone array of numbers

Author: linev

scripts/JSRootCore.js

@@ -278,9 +278,10 @@
          var tgt = [];
          map.obj.push(src);
          map.clones.push(tgt);
-         for (var i = 0; i < src.length; ++i)
+         if (typeof src[i] === 'object')
             tgt.push(JSROOT.clone(src[i], map));
-
+         else
+            tgt.push(src[i]);
          return tgt;
       }