Unbreak 'searched_lib.py'.
* new/virtual-target.jam
(null-action): Pass '.no-action' as action name, not 'no-action'. The
action name is really dummy, it's not used at all. However, when it does
not include dot, the smart 'action' ctor will assume it's local and prepend
module name to it. The calling module will be 'null-action' instance module,
always unique, and as result, no two targets with null actions will be
equal, as far as 'virtual-target.register' is concerned.
[SVN r18424]
Vladimir Prus