target.c (gomp_map_vars): Initialize tgt->tgt_start and tgt->tgt_end to 0 when mapnum is 0.

libgomp/
	* target.c (gomp_map_vars): Initialize tgt->tgt_start and tgt->tgt_end
	to 0 when mapnum is 0.

Co-Authored-By: Aleksander Ivanushenko <aleksander.ivanushenko@intel.com>

From-SVN: r228825

libgomp/ChangeLog

+2015-10-14  Ilya Verbin  <ilya.verbin@intel.com>
+	    Aleksander Ivanushenko  <aleksander.ivanushenko@intel.com>
+
+	* target.c (gomp_map_vars): Initialize tgt->tgt_start and tgt->tgt_end
+	to 0 when mapnum is 0.
+
 2015-10-14  Sebastian Huber  <sebastian.huber@embedded-brains.de>
 
 	* fortran.c (omp_get_place_proc_ids_, omp_get_partition_place_nums_):

libgomp/target.c

@@ -324,7 +324,11 @@ gomp_map_vars (struct gomp_device_descr *devicep, size_t mapnum,
   tgt->device_descr = devicep;
 
   if (mapnum == 0)
-    return tgt;
+    {
+      tgt->tgt_start = 0;
+      tgt->tgt_end = 0;
+      return tgt;
+    }
 
   tgt_align = sizeof (void *);
   tgt_size = 0;