Shortly after the 4.4.1 update, Google has now started rolling out the 4.4.2 update for the Nexus devices. Whereas the previous update focused on improving the camera performance on the Nexus 5, the latest one merely includes bug fixes.
There is no official change log from Google but according to Sprint, the following changes have been made:
The update is rolling out to the Nexus 5, Nexus 4, Nexus 7 (2012 and 2013 models) and the Nexus 10. If you didn't get the 4.4.1 update it's fine as you can directly install the 4.4.2 update as soon as it is available for you.