### Godot version

4.0 Beta10

### System information

Windows 10, Vulkan, GTX1060

### Issue description

`PropertyTweener`'s methods' return value are not discarded and effect the unary operator at next line.

In Editor:
![in_editor](https://user-images.githubusercontent.com/61624558/210715100-04bdf283-7954-4be3-94ca-338987b24c5b.png)


In cpp:
![in_cpp](https://user-images.githubusercontent.com/61624558/210715127-519f6d54-fc15-468f-9aca-ba7d387a5a7b.png)


### Steps to reproduce

Just run the Minimal reproduction project.

### Minimal reproduction project

[Bug Report.zip](https://github.com/godotengine/godot/files/10349829/Bug.Report.zip)

#ifdef TOOLS_ENABLED
		p_script->member_lines[name] = inner_class->start_line;
#endif
		p_script->constants.insert(name, subclass); 
	}
	return OK;
}
Error GDScriptCompiler::_compile_class(GDScript *p_script, const GDScriptParser::ClassNode *p_class, bool p_keep_state) {
	
	for (int i = 0; i < p_class->members.size(); i++) {
		const GDScriptParser::ClassNode::Member &member = p_class->members[i];
		if (member.type == member.FUNCTION) {
			const GDScriptParser::FunctionNode *function = member.function;
			Error err = OK;
			_parse_function(err, p_script, p_class, function);
			if (err) {
				return err;
			}
		} else if (member.type == member.VARIABLE) {
			const GDScriptParser::VariableNode *variable = member.variable;
			if (variable->property == GDScriptParser::VariableNode::PROP_INLINE) {
				if (variable->setter != nullptr) {
					Error err = _parse_setter_getter(p_script, p_class, variable, true);
					if (err) {
						return err;
					}
				}
				if (variable->getter != nullptr) {
					Error err = _parse_setter_getter(p_script, p_class, variable, false);
					if (err) {