Randomly Out of memory errors precedeed by JsVarOverflow

I've now made E.getSizeOf a bit more powerful. On latest git builds (and for 1v81), you can do:

>function a(b) {
:  return function() {
:  };
:}
=function (b) { ... }

>E.getSizeOf(a("Something really big"))
=12

>E.getSizeOf(a("Something really big"), 1)
=[
  {
    "name": "ÿcod",
    "size": 3 },
  {
    "name": "ÿsco",
    "size": 8 }
 ]

>E.getSizeOf(a("Something really big"), 2)
=[
  {
    "name": "ÿcod",
    "size": 3 },
  {
    "name": "ÿsco",
    "size": 8,
    "more": [
      {
"name": "b",
"size": 4 },
      {
"name": "return",
"size": 2 }
     ]
   }
 ]