main/php_variables: use zend_string_equals_literal()

Author: MaxKellermann

main/php_variables.c

@@ -702,8 +702,7 @@ static void php_autoglobal_merge(HashTable *dest, HashTable *src)
 			|| Z_TYPE_P(dest_entry) != IS_ARRAY) {
 			Z_TRY_ADDREF_P(src_entry);
 			if (string_key) {
-				if (!globals_check || ZSTR_LEN(string_key) != sizeof("GLOBALS") - 1
-						|| memcmp(ZSTR_VAL(string_key), "GLOBALS", sizeof("GLOBALS") - 1)) {
+				if (!globals_check || !zend_string_equals_literal(string_key, "GLOBALS")) {
 					zend_hash_update(dest, string_key, src_entry);
 				} else {
 					Z_TRY_DELREF_P(src_entry);