Add AST-printing support for (void)

Author: TimWolla

Zend/tests/type_casts/cast_to_void_ast.phpt

@@ -0,0 +1,18 @@
+--TEST--
+(void) is included in AST printing
+--FILE--
+<?php
+
+try {
+    assert(false && function () {
+        (void) somefunc();
+    });
+} catch (Error $e) {
+    echo $e->getMessage(), "\n";
+}
+
+?>
+--EXPECT--
+assert(false && function () {
+    (void)somefunc();
+})

Zend/zend_ast.c

@@ -2261,6 +2261,9 @@ static ZEND_COLD void zend_ast_export_ex(smart_str *str, zend_ast *ast, int prio
 				EMPTY_SWITCH_DEFAULT_CASE();
 			}
 			break;
+		case ZEND_AST_CAST_VOID:
+			PREFIX_OP("(void)", 240, 241);
+			break;
 		case ZEND_AST_EMPTY:
 			FUNC_OP("empty");
 		case ZEND_AST_ISSET: