1.5.1 currentPendingRequests removal doesn't remove all requests and breaks seeking

[JibberJim]

1.5.1 has various seeking bugs, one of them is related to the removal of cancelled requests being broken due to pendingRequests not being correctly removed in FragmentModel.js, as the reqs/cancelled is copied by reference, this code shows the issue:

function test(quality) {
    var reqs = pendingRequests,
    canceled = reqs;
    pendingRequests = [];
    if (quality !== undefined) {
        pendingRequests = reqs.filter(function(request) {
          if (request.quality === quality) {
              return false;
          }
          canceled.splice(canceled.indexOf(request), 1);
          return true;
                                      });
    }

    alert(JSON.stringify(pendingRequests)+"\n\n"+JSON.stringify(canceled));    

 }

var pendingRequests=[{quality:1},{quality:2},{quality:3},{quality:4},{quality:1},{quality:2},{quality:3},{quality:4}];
test(1);

The result is seeking is broken sometimes when seeking into pending requests.

[dsparacio]

should not be an issue in 2.0