write newline since kit_string_entry_create doesn't do that any more

src/polkit-grant/polkit-authorization-db-write.c

@@ -91,6 +91,7 @@ _polkit_authorization_db_auth_file_add (const char *root, polkit_bool_t transien
         polkit_bool_t ret;
         struct stat statbuf;
         struct passwd *pw;
+        char *newline = "\n";
 
         ret = FALSE;
         path = NULL;
@@ -170,6 +171,14 @@ _polkit_authorization_db_auth_file_add (const char *root, polkit_bool_t transien
                 }
                 goto out;
         }
+        if (!_write_to_fd (fd, newline, 1)) {
+                g_warning ("Cannot write to temporary authorizations file %s: %m", path_tmp);
+                close (fd);
+                if (unlink (path_tmp) != 0) {
+                        g_warning ("Cannot unlink %s: %m", path_tmp);
+                }
+                goto out;
+        }
         close (fd);
 
         if (path != NULL) {