From acebb048a5372c4f45be9347e789843914f14ec1 Mon Sep 17 00:00:00 2001
From: Naoki Kanatani <k12naoki@gmail.com>
Date: Fri, 23 Jun 2017 06:57:14 +0900
Subject: [PATCH] Change more proper grammer

Use `!metadata` instead of `metadata == NULL`.
---
 ext/mysql2/statement.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ext/mysql2/statement.c b/ext/mysql2/statement.c
index ca63df948..d7fffcc6b 100644
--- a/ext/mysql2/statement.c
+++ b/ext/mysql2/statement.c
@@ -479,7 +479,7 @@ static VALUE fields(VALUE self) {
 #endif
 
   metadata = mysql_stmt_result_metadata(stmt);
-  if (metadata == NULL) {
+  if (!metadata) {
     return rb_ary_new();
   }
   fields      = mysql_fetch_fields(metadata);