don't resize iframe if we can't find a final size greater than 0

js/main.js

@@ -1,5 +1,5 @@
 	function resizeIframe(obj) {
-    obj.style.height = 0;
+		//obj.style.height = 0;
 		_resizeIframe(obj, 0);
 	}
 
@@ -13,7 +13,7 @@
 		if (desth!=ch) {
 			setTimeout(_resizeIframe, 500, obj, ch);
 		} else {
-		obj.style.height  = ch;
+			if (ch>0) obj.style.height  = ch;
 			setTimeout(_resizeIframe, 1000, obj, ch);
 		}
 	}