run-tests: remove unnecessary variable initialisation ret is always set before it is used, so remove ret = 0 [ original upstream message ]

Merge with stable

tests: killdaemons.py for windows distinguishes access violation and terminated To distinguish between access violaition (process belonging to another user) and a terminated process, PROCESS_QUERY_INFORMATION must be enabled. But TerminateProcess still raises error 5 in both cases. Therefore check before if the process has already terminated. [ original upstream message ]