viewport/adView required on impression for limited

[jimdigriz]

Page 67 of the OMID API 1.2 tells me I am owed a viewport/adView at impression time :)

For the 'master' branch (the 'test-1.3' branch doesn't work for me) it looks like for 'Native Image' (in-app and 'limited') you fire the impression before the ad is viewable which causes viewport and adView to be undefined?

Maybe I am doing something wrong?

For now I have added a publisher quirk to delay the impression event handling until the first usable AdEventType.GEOMETRY_CHANGE event.