### Godot version

v4.0.3.stable.official [5222a99f5]
Master [6101240231600c871f5c5473872532c68ea3268c] (confirmed by https://github.com/godotengine/godot/issues/77666#issuecomment-1568952502)

### System information

Window 10

### Issue description

References are not unreferenced at the end of `if` scopes.

### Steps to reproduce

Copy, paste and run the snippet below, check the results:

```gdscript
extends Node


func _ready() -> void:
  var ref := RefCounted.new()
  var ref_count : int

  # OK
  ref_count = ref.get_reference_count()
  print('Expected: 1, Result: %d' % ref_count)

  # OK
  if true:
    var temp := ref
    temp = null

  ref_count = ref.get_reference_count()
  print('Expected: 1, Result: %d' % ref_count)

  # FAIL
  if true:
    var temp := ref

  ref_count = ref.get_reference_count()
  print('Expected: 1, Result: %d' % ref_count)
```

Output example:

```
Expected: 1, Result: 1
Expected: 1, Result: 1
Expected: 1, Result: 2
```

### Minimal reproduction project

N/A
decrease_indent();
			}
		}
	}
	decrease_indent();
	push_line();
}
void GDScriptParser::TreePrinter::print_while(WhileNode *p_while) {
	push_text("While ");
	print_expression(p_while->condition);
	push_line(" :");
	increase_indent();
	print_suite(p_while->loop);
	decrease_indent();
}
void GDScriptParser::TreePrinter::print_tree(const GDScriptParser &p_parser) {
	ERR_FAIL_COND_MSG(p_parser.get_tree() == nullptr, "Parse the code before printing the parse tree.");
	if (p_parser.is_tool()) {
		push_line("@tool");
	}
	if (!p_parser.get_tree()->icon_path.is_empty()) {
		push_text(R"(@icon (")");
		push_text(p_parser.get_tree()->icon_path);
		push_line("\")");
	}
	print_class(p_parser.get_tree());
	print_line(String(printed));
}
#endif