SebmGoogleMap marker breaks when lat/lng is 0

[sebholstein]

Reported by @uthark:

If I pass location 0, 0 then component breaks with the error. The issue looks like in SebmGoogleMapMarker.prototype.ngOnChanges - condition if (!this._markerAddedToManger && this.latitude && this.longitude) is evaluated to false, so MarkerManager.addMarker is not called, but the marker exists in model. So, on render phase there is an issue I posted above.

Plunker: http://plnkr.co/edit/62hA5e?p=preview