From 80906f721e4812549f3af596a64100249d803060 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Fri, 26 Mar 2021 14:24:13 -0400
Subject: map: Add some sanity checks

---
diff --git a/src/map.c b/src/map.c
index 9aaccaa..fdb2456 100644
--- a/src/map.c
+++ b/src/map.c
@@ -659,6 +659,16 @@ _db_tmx_map_el_start(void *pv, const char *name, const char **attr)
 		db_xml_node_push(p, map, _db_tmx_data_start,
 				_db_tmx_layer_end, NULL);
 	} else if (db_xml_check_tag(name, "objectgroup")) {
+		if (map->fr == 0) {
+			db_err("Map framerate not set");
+			XML_StopParser(p, XML_FALSE);
+			return;
+		}
+		if (map->tileset_tail == NULL) {
+			db_err("Map tileset(s) must precede objects");
+			XML_StopParser(p, XML_FALSE);
+			return;
+		}
 		db_xml_node_push(p, map, _db_tmx_object_start,
 				_db_tmx_objectgroup_end, NULL);
 	} else {
--
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