fixup! Add (void) cast

Author: TimWolla

Zend/tests/attributes/nodiscard/suppress_cast_destructor.phpt

@@ -0,0 +1,31 @@
+--TEST--
+#[\NoDiscard]: Casting to (void) destroys the value.
+--FILE--
+<?php
+
+class WithDestructor {
+	public function __destruct() {
+		echo __METHOD__, PHP_EOL;
+	}
+}
+
+#[\NoDiscard]
+function test(): WithDestructor {
+	return new WithDestructor();
+}
+
+function do_it(): void {
+	echo "Before", PHP_EOL;
+
+	(void)test();
+
+	echo "After", PHP_EOL;
+}
+
+do_it();
+
+?>
+--EXPECT--
+Before
+WithDestructor::__destruct
+After