Really fix warning when file disposition isn't set.

If AppStdoutDisposition and AppStderrDisposition are both missing from
the registry, the service editing GUI would still incorrectly complain
that the current configuration couldn't be represented in the interface
even though a previous commit claimed to fix that.

gui.cpp

@@ -165,7 +165,7 @@ int nssm_gui(int resource, nssm_service_t *service) {
     if (! service->rotate_bytes_high) SetDlgItemInt(tablist[NSSM_TAB_ROTATION], IDC_ROTATE_BYTES_LOW, service->rotate_bytes_low, 0);
 
     /* Check if advanced settings are in use. */
-    if (service->stdout_disposition != service->stderr_disposition || (service->stdout_disposition != NSSM_STDOUT_DISPOSITION && service->stdout_disposition != CREATE_ALWAYS) || (service->stderr_disposition != NSSM_STDERR_DISPOSITION && service->stderr_disposition != CREATE_ALWAYS)) popup_message(dlg, MB_OK | MB_ICONWARNING, NSSM_GUI_WARN_STDIO);
+    if (service->stdout_disposition != service->stderr_disposition || (service->stdout_disposition && service->stdout_disposition != NSSM_STDOUT_DISPOSITION && service->stdout_disposition != CREATE_ALWAYS) || (service->stderr_disposition && service->stderr_disposition != NSSM_STDERR_DISPOSITION && service->stderr_disposition != CREATE_ALWAYS)) popup_message(dlg, MB_OK | MB_ICONWARNING, NSSM_GUI_WARN_STDIO);
     if (service->rotate_bytes_high) popup_message(dlg, MB_OK | MB_ICONWARNING, NSSM_GUI_WARN_ROTATE_BYTES);
 
     /* Environment tab. */