problem on ABCL

[avodonosov]

See fukamachi/clack#74

[fukamachi]

Oh, you already reported.
It seems a problem when adding an appender.

For example, this code causes the below error.

(log4cl:add-appender log4cl:*root-logger* (make-instance 'log4cl:console-appender))

#<THREAD "interpreter" {1615B33B}>: Debugger invoked on condition of type SIMPLE-TYPE-ERROR
  The value of BORDEAUX-THREADS::LOCK is #<BORDEAUX-THREADS::MUTEX {1CAD8848}>, which is not of type BORDEAUX-THREADS::MUTEX-RECURSIVE.
Restarts:
  0: STORE-VALUE Supply a new value for BORDEAUX-THREADS::LOCK.
  1: TOP-LEVEL   Return to top level.

I have totally no idea what this error is saying.

[knobo]

Fixed:

knobo@47e28e4
Needs some testing though.