RIOT-OS/RIOT — pull request #569 by kaspar030 (2014-01-25 14:43:08+00:00)
Title: core: msg: don't wake up sender after receive if it's REPLY_BLOCKED

solves issue #100

If the sender is reply-blocked, waking it up after its message has been
delivered is wrong. It needs to stay reply-blocked until the reply has
been delivered.

Someone cares to write a test case?