patch 8.0.1029: return value of getqflist() is inconsistent

Problem:    Return value of getqflist() is inconsistent.  (Lcd47)
Solution:   Always return an "items" entry.
diff --git a/src/quickfix.c b/src/quickfix.c
index 8277b93..1082fbd 100644
--- a/src/quickfix.c
+++ b/src/quickfix.c
@@ -4653,6 +4653,11 @@
 	    || (di->di_tv.v_type == VAR_LIST
 		&& di->di_tv.vval.v_list != NULL))
     {
+	list_T	*l = list_alloc();
+
+	if (l == NULL)
+	    return FAIL;
+
 	qi = (qf_info_T *)alloc((unsigned)sizeof(qf_info_T));
 	if (qi != NULL)
 	{
@@ -4662,17 +4667,13 @@
 	    if (qf_init_ext(qi, 0, NULL, NULL, &di->di_tv, p_efm,
 			TRUE, (linenr_T)0, (linenr_T)0, NULL, NULL) > 0)
 	    {
-		list_T	*l = list_alloc();
-		if (l != NULL)
-		{
-		    (void)get_errorlist(qi, NULL, 0, l);
-		    dict_add_list(retdict, "items", l);
-		    status = OK;
-		}
+		(void)get_errorlist(qi, NULL, 0, l);
 		qf_free(qi, 0);
 	    }
 	    free(qi);
 	}
+	dict_add_list(retdict, "items", l);
+	status = OK;
     }
 
     return status;