Crash fix for a case where the EndCallback is not set and used
Merge pull request #209 from robUx4/endcallback_npe_fix

Crash fix for a case where the EndCallback is not set and used
potential fix for selector exception in L preview.

https://github.com/koush/AndroidAsync/issues/196
potential fix for selector exception in L preview.

https://github.com/koush/AndroidAsync/issues/196
Merge branch 'master' into spdy

Conflicts:
	AndroidAsync/src/com/koushikdutta/async/BufferedDataEmitter.java