hpcc-systems/HPCC-Platform — pull request #1334 by jakesmith (2012-01-23 19:27:25+00:00)
Title: Fix deadlock stopping merge distribute

If merge dist stopped early, it could deadlock, because it failed
to signal a pending semaphore
Also start didn't reset stopping flag which could cause problems if in child
queries

Signed-off-by: Jake Smith