Fix error message

Author: dstogov

ext/opcache/ZendAccelerator.c

@@ -3777,7 +3777,8 @@ static void preload_link(void)
 		}
 		if (!(ce->ce_flags & ZEND_ACC_LINKED)) {
 			zend_string *key = zend_string_tolower(ce->name);
-			if (zend_hash_exists(EG(class_table), key)) {
+			if (!(ce->ce_flags & ZEND_ACC_ANON_CLASS)
+			 && zend_hash_exists(EG(class_table), key)) {
 				zend_error_at(
 					E_WARNING, ZSTR_VAL(ce->info.user.filename), ce->info.user.line_start,
 					"Can't preload already declared class %s", ZSTR_VAL(ce->name));