coverity pointed out a deadlock - CID 1226193. i hope this fixes it
(need to wait days for a coverity re-run). tests pass and real life
usage works, so i assume its ok. in theory i see no problem either.
@feature
This is a new feature for eina (and EFL) - a zero-copy thread message
queue for sending messages from one thread to another or from the
ecore mainloop to or back to the mainloop from threads. It has a
complete test suite too.
Carsten Haitzler