process events on sleep start even if parrot doesn't have threads
process events on sleep start even if parrot doesn't have threads

This isn't the best solution. the thread will execute all pending tasks and then sleep for the specified duration in stead of executing pending tasks during the sleep interval. But it does prevent coretest from hanging on t/pmc/timer.t on threadless platforms.


git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@49432 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

gagern/parrot,gagern/parrot,gitster/parrot,youprofit/parrot,FROGGS/parrot,gagern/parrot,tewk/parrot-select,youprofit/parrot,fernandobrito/parrot,youprofit/parrot,gitster/parrot,gagern/parrot,tkob/parrot,parrot/parrot,tkob/parrot,parrot/parrot,tewk/parrot-select,youprofit/parrot,gitster/parrot,tkob/parrot,tkob/parrot,FROGGS/parrot,FROGGS/parrot,tewk/parrot-select,gagern/parrot,fernandobrito/parrot,FROGGS/parrot,fernandobrito/parrot,gagern/parrot,tewk/parrot-select,FROGGS/parrot,fernandobrito/parrot,tewk/parrot-select,gitster/parrot,FROGGS/parrot,tkob/parrot,fernandobrito/parrot,fernandobrito/parrot,tewk/parrot-select,tewk/parrot-select,FROGGS/parrot,tkob/parrot,youprofit/parrot,parrot/parrot,parrot/parrot,FROGGS/parrot,tkob/parrot,youprofit/parrot,gitster/parrot,fernandobrito/parrot,gagern/parrot,tkob/parrot,gitster/parrot,gitster/parrot,youprofit/parrot,youprofit/parrot,parrot/parrot