From 81f695a6723e82708408ea130f10a5fb9e13ff90 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20T=C5=AFma?= <tumic@cbox.cz>
Date: Mon, 3 Apr 2023 23:29:35 +0200
Subject: [PATCH] Fixed crash on empty IMG/GMAP maps

---
 src/map/IMG/mapdata.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/map/IMG/mapdata.cpp b/src/map/IMG/mapdata.cpp
index 6eee71cc..16c55934 100644
--- a/src/map/IMG/mapdata.cpp
+++ b/src/map/IMG/mapdata.cpp
@@ -109,6 +109,9 @@ void MapData::computeZooms()
 			zooms.insert(z.at(i));
 	}
 
+	if (zooms.isEmpty())
+		return;
+
 	_zooms = zooms.values();
 	std::sort(_zooms.begin(), _zooms.end());