imageNamed:nil reports log error in xcode 5

The following was logged each time `[UIImage imageNamed:name];` was called with name = nil.
"CUICatalog: Invalid asset name supplied: (null), or invalid scale factor: 2.000000"

There was no apparent detriment to the app, just to the logging file as it happened 50x per load for my app. I could figure out no way to rectify this short of updating the code to check for nil before requesting named images.