vlib: introduce vlib_get_elog_main()

Type: improvement
Change-Id: I73383eb15186021cd6527d112da8443a0082f129
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/src/vlib/threads.c b/src/vlib/threads.c
index 939f910..cf82e18 100644
--- a/src/vlib/threads.c
+++ b/src/vlib/threads.c
@@ -686,7 +686,7 @@
   /* Set up the main thread */
   vec_add2_aligned (vlib_worker_threads, w, 1, CLIB_CACHE_LINE_BYTES);
   w->elog_track.name = "main thread";
-  elog_track_register (&vm->elog_main, &w->elog_track);
+  elog_track_register (vlib_get_elog_main (), &w->elog_track);
 
   if (vec_len (tm->thread_prefix))
     {
@@ -770,7 +770,7 @@
 	      w->elog_track.name =
 		(char *) format (0, "%s %d", tr->name, k + 1);
 	      vec_add1 (w->elog_track.name, 0);
-	      elog_track_register (&vm->elog_main, &w->elog_track);
+	      elog_track_register (vlib_get_elog_main (), &w->elog_track);
 
 	      if (tr->no_data_structure_clone)
 		continue;
@@ -944,7 +944,7 @@
 		(char *) format (0, "%s %d", tr->name, j + 1);
 	      w->registration = tr;
 	      vec_add1 (w->elog_track.name, 0);
-	      elog_track_register (&vm->elog_main, &w->elog_track);
+	      elog_track_register (vlib_get_elog_main (), &w->elog_track);
 	    }
 	}
     }