From a79e6e46dad6be977072a8bdae679696a95d1fe0 Mon Sep 17 00:00:00 2001
From: James Turner <james@flightgear.org>
Date: Sun, 1 Aug 2021 17:09:20 +0100
Subject: [PATCH] GUI: don't warn on empty dialogs

---
 src/GUI/new_gui.cxx | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/GUI/new_gui.cxx b/src/GUI/new_gui.cxx
index 219c2bd21..c54e7b2ac 100644
--- a/src/GUI/new_gui.cxx
+++ b/src/GUI/new_gui.cxx
@@ -201,6 +201,11 @@ NewGUI::update (double delta_time_sec)
 bool
 NewGUI::showDialog (const string &name)
 {
+    if (name.empty()) {
+        SG_LOG(SG_GENERAL, SG_ALERT, "showDialog: no dialog name provided");
+        return false;
+    }
+
     // first, check if it's already shown
     if (_active_dialogs.find(name) != _active_dialogs.end()){
         _active_dialogs[name]->bringToFront();