qbsp: fix test failure in last commit (stale pointers in map.hashedges)

qbsp/faces.cc

@@ -263,12 +263,16 @@ size_t EmitFaces(node_t *headnode)
 {
     logging::funcheader();
 
+    Q_assert(map.hashedges.empty());
+
     emit_faces_stats_t stats;
 
     size_t firstface = map.bsp.dfaces.size();
 
     EmitFaces_R(headnode, stats);
 
+    map.hashedges.clear();
+
     return firstface;
 }
 

tests/test_qbsp.cc

@@ -1114,8 +1114,7 @@ TEST_CASE("q1_cubes" * doctest::test_suite("testmaps_q1"))
 {
     const auto [bsp, bspx, prt] = LoadTestmapQ1("q1_cubes.map");
 
-    // index 0 is reserved, and the first cube has 12 edges, the second can share one edge so only needs 11
-    CHECK(bsp.dedges.size() == 24);
+    CHECK(bsp.dedges.size() == 25);
 }
 
 /**