tmpfiles: minor modernizations
diff --git a/src/tmpfiles/tmpfiles.c b/src/tmpfiles/tmpfiles.c
index bb12dd0..f515fe8 100644
--- a/src/tmpfiles/tmpfiles.c
+++ b/src/tmpfiles/tmpfiles.c
@@ -1021,7 +1021,9 @@
 }
 
 static void item_free(Item *i) {
-        assert(i);
+
+        if (!i)
+                return;
 
         free(i->path);
         free(i->argument);
@@ -1150,7 +1152,7 @@
                 }
         }
 
-        switch(type) {
+        switch (type) {
 
         case CREATE_FILE:
         case TRUNCATE_FILE:
@@ -1214,7 +1216,7 @@
         }
 
         default:
-                log_error("[%s:%u] Unknown file type '%c'.", fname, line, type);
+                log_error("[%s:%u] Unknown command type '%c'.", fname, line, type);
                 return -EBADMSG;
         }
 
@@ -1413,9 +1415,11 @@
                         break;
 
                 case ARG_ROOT:
+                        free(arg_root);
                         arg_root = path_make_absolute_cwd(optarg);
                         if (!arg_root)
                                 return log_oom();
+
                         path_kill_slashes(arg_root);
                         break;
 
@@ -1513,7 +1517,7 @@
 
         r = parse_argv(argc, argv);
         if (r <= 0)
-                return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+                goto finish;
 
         log_set_target(LOG_TARGET_AUTO);
         log_parse_environment();