nmcli: fix double free

src/nmcli/devices.c:1196: double_free: Calling "_nm_auto_strfreev" frees pointer "arg_arr" which has already been freed.

Fixes: c5d45848dd ('cli: mark argv argument for command line parsing as const')

src/nmcli/devices.c

@@ -1149,7 +1149,7 @@ get_device_list(NmCli *nmc, int *argc, const char *const **argv)
     if (*argc == 0) {
         g_string_printf(nmc->return_text, _("Error: No interface specified."));
         nmc->return_value = NMC_RESULT_ERROR_USER_INPUT;
-        goto error;
+        return NULL;
     }
 
     devices = nmc_get_devices_sorted(nmc->client);
@@ -1190,9 +1190,6 @@ get_device_list(NmCli *nmc, int *argc, const char *const **argv)
     }
     g_free(devices);
 
-error:
-    g_strfreev(arg_arr);
-
     return queue;
 }