* harbour/source/vm/thread.c
* release thread return value when is retrieve
* harbour/common.mak
* harbour/source/rtl/Makefile
+ harbour/source/rtl/tthreadx.prg
+ added xBase++ compatible signal class
* harbour/source/rdd/wacore.c
! added missing alias setting after attaching work area
+ harbour/tests/mt/mttest09.prg
+ added test code for using the same work area in different threads
88d4f41e4f