[RTEMS] Fix libgomp for nthreads == 1

libgomp/

        * config/rtems/pool.h (gomp_get_thread_pool): Return proper
        thread pool in case nthreads == 1.

From-SVN: r243179

libgomp/ChangeLog

+2016-12-02  Sebastian Huber  <sebastian.huber@embedded-brains.de>
+
+	* config/rtems/pool.h (gomp_get_thread_pool): Return proper
+	thread pool in case nthreads == 1.
+
 2016-11-30  Alexander Monakov  <amonakov@ispras.ru>
 
 	* config/nvptx/env.c: Delete.

libgomp/config/rtems/pool.h

@@ -87,14 +87,12 @@ static inline struct gomp_thread_pool *
 gomp_get_thread_pool (struct gomp_thread *thr, unsigned nthreads)
 {
   struct gomp_thread_pool *pool;
+  struct gomp_thread_pool_reservoir *res;
 
   if (__builtin_expect (thr->thread_pool == NULL, 0))
     pthread_setspecific (gomp_thread_destructor, thr);
 
-  if (nthreads != 1)
-    {
-      struct gomp_thread_pool_reservoir *res =
-	gomp_get_thread_pool_reservoir ();
+  res = gomp_get_thread_pool_reservoir ();
   if (res != NULL)
     {
       gomp_sem_wait (&res->available);
@@ -106,9 +104,7 @@ gomp_get_thread_pool (struct gomp_thread *thr, unsigned nthreads)
     }
   else
     pool = gomp_get_own_thread_pool (thr, nthreads);
-    }
-  else
-    pool = NULL;
+
   return pool;
 }