Add abort mechanism when invoking EditorNavigationMeshGenerator::bake in-game

modules/recast/navigation_mesh_generator.cpp

@@ -433,6 +433,11 @@ EditorNavigationMeshGenerator::~EditorNavigationMeshGenerator() {
 
 void EditorNavigationMeshGenerator::bake(Ref<NavigationMesh> p_nav_mesh, Node *p_node) {
 
+	if (!Engine::get_singleton()->is_editor_hint()) {
+		ERR_PRINTS("Invoking EditorNavigationMeshGenerator::bake(...) in-game is not supported in Godot 3.2 or below. Aborting bake...");
+		return;
+	}
+
 	ERR_FAIL_COND(!p_nav_mesh.is_valid());
 
 	EditorProgress ep("bake", TTR("Navigation Mesh Generator Setup:"), 11);