Code modernization: src/n*, src/o* (#6280)

* Code modernization: src/n*, src/o*

* empty function
* default constructor/destructor
* for range-based loops
* use emplace_back instead of push_back
* remove unused IWritableNodeDefManager::clone()
* C++ STL header style
* Pointer constness in some functions

1 files changed, 1 insertions, 1 deletions

diff --git a/src/objdef.h b/src/objdef.h
index 04f067975..b06d4a85e 100644
--- a/src/objdef.h
+++ b/src/objdef.h
@@ -43,7 +43,7 @@ enum ObjDefType {
 
 class ObjDef {
 public:
-	virtual ~ObjDef() {}
+	virtual ~ObjDef() = default;
 
 	u32 index;
 	u32 uid;