DEBUG fix macro expand

Author: mvorisek

ext/gmp/gmp.c

@@ -371,7 +371,7 @@ static int gmp_do_operation_ex(zend_uchar opcode, zval *result, zval *op1, zval
 	switch (opcode) {
 	case ZEND_ADD:
         gmp_zval_binary_ui_op(
-            result, op1, op2, mpz_add, mpz_add ## _ui, 0, /* is_operator */ true);
+            result, op1, op2, mpz_add, mpz_add_ui, 0, /* is_operator */ true);
         if (UNEXPECTED(EG(exception))) { return FAILURE; }
         return SUCCESS;
 	case ZEND_SUB: