Merge pull request #4794 from ahocevar/fixed-tileloading

Make tile loading count no longer depend on source count

src/ol/renderer/layerrenderer.js

@@ -298,7 +298,6 @@ ol.renderer.Layer.prototype.manageTilePyramid = function(
   var tileSourceKey = goog.getUid(tileSource).toString();
   if (!(tileSourceKey in frameState.wantedTiles)) {
     frameState.wantedTiles[tileSourceKey] = {};
-    ++frameState.tileSourceCount;
   }
   var wantedTiles = frameState.wantedTiles[tileSourceKey];
   var tileQueue = frameState.tileQueue;