many small fixes, RU lang

src/core/scene/glscene.cpp

@@ -53,12 +53,13 @@ Scene * Scene::clone() {
 }
 
 
-void Scene::addObject(ObjectBase * o) {
+void Scene::addObject(ObjectBase * o, ObjectBase * parent) {
+	if (!parent) parent = root_;
 	ObjectBaseList aol = o->children(true);
 	attachObject(o);
 	foreach(ObjectBase * c, aol)
 		attachObject(c);
-	root_->addChild(o);
+	parent->addChild(o);
 	tree_changed = tree_struct_changed = true;
 }
 
@@ -104,6 +105,7 @@ void Scene::clear() {
 	geometries.clear();
 	materials.clear();
 	emit __destroyed();
+	if (destroying) return;
 	emit treeChanged();
 }
 
@@ -150,6 +152,7 @@ void Scene::removeObjectInternal(ObjectBase * o, ObjectBase * where) {
 
 
 void Scene::emitSelectionChanged() {
+	if (destroying) return;
 	selected_top.clear();
 	foreach(ObjectBase * o, selected_) {
 		ObjectBase * po = o->selectedParent();