Add pixel size (prebid#892)

Author: AlexStanovsky

src/adapters/memeglobal.js

@@ -106,7 +106,7 @@ var MemeGlobalAdapter = function MemeGlobalAdapter() {
         bidResponse.placementCode = placementCode;
         bidResponse.size = bidRequested.sizes;
         var responseAd = bidderBid.adm;
-        var responseNurl = '<img src="' + bidderBid.nurl + '">';
+        var responseNurl = '<img src="' + bidderBid.nurl + '" height="0px" width="0px">';
         bidResponse.creative_id = bidderBid.id;
         bidResponse.bidderCode = bidderName;
         bidResponse.cpm = responseCPM;

test/spec/adapters/memeglobal_spec.js

@@ -161,7 +161,7 @@ describe('memeglobal adapter tests', function () {
       expect(bidObject1.cpm).to.equal(0.09);
       expect(bidObject1.height).to.equal(250);
       expect(bidObject1.width).to.equal(300);
-      expect(bidObject1.ad).to.equal('ad-code<img src="http://url">');
+      expect(bidObject1.ad).to.equal('ad-code<img src="http://url" height="0px" width="0px">');
 
       stubAddBidResponse.calledThrice;