Fix C# exports print errors due to missing ClassDB binding

Author: limbonaut

bt/tasks/bt_task.cpp

@@ -386,16 +386,21 @@ void BTTask::print_tree(int p_initial_tabs) {
 	}
 }
 
-#ifdef TOOLS_ENABLED
-
 Ref<BehaviorTree> BTTask::editor_get_behavior_tree() {
+#ifdef TOOLS_ENABLED
 	BTTask *task = this;
 	while (task->data.behavior_tree_id.is_null() && task->get_parent().is_valid()) {
 		task = task->data.parent;
 	}
 	return Object::cast_to<BehaviorTree>(ObjectDB::get_instance(task->data.behavior_tree_id));
+#else
+	ERR_PRINT("BTTask::editor_get_behavior_tree: Not available in release builds.");
+	return Ref<BehaviorTree>();
+#endif
 }
 
+#ifdef TOOLS_ENABLED
+
 void BTTask::editor_set_behavior_tree(const Ref<BehaviorTree> &p_bt) {
 	data.behavior_tree_id = p_bt->get_instance_id();
 }
@@ -423,9 +428,7 @@ void BTTask::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("print_tree", "initial_tabs"), &BTTask::print_tree, Variant(0));
 	ClassDB::bind_method(D_METHOD("get_task_name"), &BTTask::get_task_name);
 	ClassDB::bind_method(D_METHOD("abort"), &BTTask::abort);
-#ifdef TOOLS_ENABLED
 	ClassDB::bind_method(D_METHOD("editor_get_behavior_tree"), &BTTask::editor_get_behavior_tree);
-#endif // TOOLS_ENABLED
 
 	// Properties, setters and getters.
 	ClassDB::bind_method(D_METHOD("get_agent"), &BTTask::get_agent);

bt/tasks/bt_task.h

@@ -166,8 +166,8 @@ class BTTask : public BT {
 
 	void print_tree(int p_initial_tabs = 0);
 
-#ifdef TOOLS_ENABLED
 	Ref<BehaviorTree> editor_get_behavior_tree();
+#ifdef TOOLS_ENABLED
 	void editor_set_behavior_tree(const Ref<BehaviorTree> &p_bt);
 #endif