From 2951e5885a1554634e2bf000cb3bdf2421c0bc5d Mon Sep 17 00:00:00 2001
From: felix <felix>
Date: Mon, 25 Jun 2018 12:46:21 +0000
Subject: Check callback prior to running it

---
 migrate.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/migrate.go b/migrate.go
index 7ce9abc..f5838f3 100644
--- a/migrate.go
+++ b/migrate.go
@@ -86,7 +86,9 @@ func (m *Migrator) MigrateTo(toVersion int64) error {
 	}
 
 	if currVersion >= toVersion {
-		go m.callback(maxVersion, currVersion, nil)
+		if m.callback != nil {
+			go m.callback(maxVersion, currVersion, nil)
+		}
 		return nil
 	}
 
-- 
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