Always terminate the task queue

BUG=none
LOG=n
TBR=hpayer@chromium.org

Review URL: https://codereview.chromium.org/107503005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18382 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/libplatform/default-platform.cc

@@ -45,8 +45,8 @@ DefaultPlatform::DefaultPlatform()
 
 DefaultPlatform::~DefaultPlatform() {
   LockGuard<Mutex> guard(&lock_);
+  queue_.Terminate();
   if (initialized_) {
-    queue_.Terminate();
     for (std::vector<WorkerThread*>::iterator i = thread_pool_.begin();
          i != thread_pool_.end(); ++i) {
       delete *i;