Remove Thread::WORKISWAITING

Set the state directly to Thread::SEARCHING

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

src/search.cpp

@@ -2187,12 +2187,10 @@ void Thread::idle_loop(SplitPoint* sp) {
       }
 
       // If this thread has been assigned work, launch a search
-      if (state == Thread::WORKISWAITING)
+      if (state == Thread::SEARCHING)
       {
           assert(!do_terminate);
 
-          state = Thread::SEARCHING;
-
           // Copy split point position and search stack and call search()
           SearchStack ss[PLY_MAX_PLUS_2];
           SplitPoint* tsp = splitPoint;