Ensure width and height are integers (#3674)

* Ensure width and height are integers

Some bidders (like OpenX) return bid responses with width and height as strings. Let's follow the docs and ensure that they indeed are integers, avoiding some strict comparison surprises.

* lint

* typo

* Update bidderFactory.js

* Update bidderFactory.js

* Update bidderFactory.js

src/adapters/bidderFactory.js

@@ -419,7 +419,9 @@ export function getIabSubCategory(bidderCode, category) {
 
 // check that the bid has a width and height set
 function validBidSize(adUnitCode, bid, bidRequests) {
-  if ((bid.width || bid.width === 0) && (bid.height || bid.height === 0)) {
+  if ((bid.width || parseInt(bid.width, 10) === 0) && (bid.height || parseInt(bid.height, 10) === 0)) {
+    bid.width = parseInt(bid.width, 10);
+    bid.height = parseInt(bid.height, 10);
     return true;
   }
 
@@ -432,8 +434,8 @@ function validBidSize(adUnitCode, bid, bidRequests) {
   // response that does not explicitly set width or height
   if (parsedSizes.length === 1) {
     const [ width, height ] = parsedSizes[0].split('x');
-    bid.width = width;
-    bid.height = height;
+    bid.width = parseInt(width, 10);
+    bid.height = parseInt(height, 10);
     return true;
   }