### 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)

continue;
			}
			GDScriptDataType field_type = _gdtype_from_datatype(field->get_datatype(), codegen.script);
			GDScriptCodeGenerator::Address dst_address(GDScriptCodeGenerator::Address::MEMBER, codegen.script->member_indices[field->identifier->name].index, field_type);
			if (field->initializer) {
				
				codegen.generator->write_newline(field->initializer->start_line);
				
				if (field_type.has_type && field_type.builtin_type == Variant::ARRAY) {
					if (field_type.has_container_element_type()) {
						codegen.generator->write_construct_typed_array(dst_address, field_type.get_container_element_type(), Vector<GDScriptCodeGenerator::Address>());
					} else {
						codegen.generator->write_construct_array(dst_address, Vector<GDScriptCodeGenerator::Address>());
					}
				}
				GDScriptCodeGenerator::Address src_address = _parse_expression(codegen, r_error, field->initializer, false, true);
				if (r_error) {
					memdelete(codegen.generator);
					return nullptr;
				}
				if (field->use_conversion_assign) {
					codegen.generator->write_assign_with_conversion(dst_address, src_address);
				} else {
					codegen.generator->write_assign(dst_address, src_address);
				}
				if (src_address.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
					codegen.generator->pop_temporary();
				}
			} else if (field_type.has_type) {
				codegen.generator->write_newline(field->start_line);