fixup tests: avoid loading sconfdir conf

tests/cfg.c

@@ -149,24 +149,25 @@ static int str_opt_cmp(const char *s1, const char *s2) {
 static void test_regular(void) {
   // Ensure that all configuration options are loaded into the configuration:
 
-  const char *argv[] = {"prompt=hi",
+  const char *argv[] = {NULL,
                         "debug", // So we have a log file for the test
-                        NULL};
+                        "prompt=hi"};
 
   struct conf_file cf;
   int r;
   cfg_t cfg, cfg_defaults;
 
+  conf_file_init(&cf, NULL);
+  argv[0] = cf.arg;
+
   // 1. Load the default
-  r = cfg_init(&cfg_defaults, 0, 0, NULL);
+  r = cfg_init(&cfg_defaults, 0, 1, argv);
   assert(r == PAM_SUCCESS);
 
   // 2. Write the configuration file, changing every field.
-  conf_file_init(&cf, NULL);
   config_flip_all(&cf, &cfg_defaults);
 
   // 3. Load from the file
-  argv[2] = cf.arg;
   r = cfg_init(&cfg, 0, sizeof(argv) / sizeof(*argv), argv);
   assert(r == PAM_SUCCESS);
   conf_file_clear(&cf);