new fetch_fullid() function

includes one usage of it for the lconstruct instruction
will add more usage later
Merge branch 'unstable' of git://github.com/mdg/qbrt
Merge remote-tracking branch 'origin/unstable' into unstable

Conflicts:
	lib/qbrt.cpp
	also fixed compile error in qbrt/module.h
Merge remote-tracking branch 'origin/unstable' into unstable