compiler/hlds_goal.m:
Add a new goal feature that marks a goal as having been lifted out of
a disjunction or switch by cse_detection.m.
compiler/cse_detection.m:
Add this feature to the deconstruction unifications lifted out by cse.
compiler/det_report.m:
When expecting the subgoal of a require_complete_switch or
require_switch_arms_detism scope to be a switch, allow the subgoal
to be a conjunction of lifted-out goals followed by the switch.
Improve the wording of an unrelated error message.
compiler/saved_vars.m:
Conform to the change to hlds_goal.m.
tests/valid/bug429.m:
A commented version of the Mantis bug 429 test case.
tests/valid/Mmakefile:
Enable the new test case.
