Assert return value of hash_copy

Author: Sjord

ext/hash/hash.c

@@ -488,7 +488,7 @@ static inline void php_hash_hmac_round(unsigned char *final, const php_hash_ops
 }
 
 static inline void php_hash_hmac_round_with_copy(unsigned char *final, const php_hash_ops *ops, const void *base_context, void *context, const unsigned char *data, const zend_long data_size) {
-	ops->hash_copy(ops, base_context, context);
+	ZEND_ASSERT(SUCCESS == ops->hash_copy(ops, base_context, context));
 	ops->hash_update(context, data, data_size);
 	ops->hash_final(final, context);
 }