vlib: introduce vlib_get_elog_main()

Type: improvement
Change-Id: I73383eb15186021cd6527d112da8443a0082f129
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/src/vlib/log.c b/src/vlib/log.c
index ed14d9e..fc67a1f 100644
--- a/src/vlib/log.c
+++ b/src/vlib/log.c
@@ -249,9 +249,10 @@
             u32 string_index;
           } *ed;
           /* *INDENT-ON* */
-	  ed = ELOG_DATA (&vm->elog_main, ee);
+	  ed = ELOG_DATA (&vlib_global_main.elog_main, ee);
 	  ed->log_level = level;
-	  ed->string_index = elog_string (&vm->elog_main, "%v", e->string);
+	  ed->string_index =
+	    elog_string (&vlib_global_main.elog_main, "%v", e->string);
 	}
 
       lm->next = (lm->next + 1) % lm->size;