fernandezpablo85/scribe-java — pull request #321 by drapp (2012-11-08 02:58:27+00:00)
Title: Avoid a mysterious NPE

One user on a particular device was getting an NPE here, meaning that either the header map had a null value, or it was getting mutated in a different thread deleting a key that we expected to be there. I wasn't able to reproduce this locally, but this should protect against any eventuality.