resolve refactoring fallout

cmd/migrate.go

@@ -37,6 +37,7 @@ func runMigrations(conf *DBConf, target int) {
 	if err != nil {
 		log.Fatal("couldn't open DB:", err)
 	}
+    defer db.Close()
 
 	current, e := ensureDBVersion(db)
 	if e != nil {

cmd/migration_sql.go

@@ -23,7 +23,6 @@ func runSQLMigration(db *sql.DB, script string, v int, direction bool) (count in
 	if err != nil {
 		log.Fatal("db.Begin:", err)
 	}
-	defer db.Close()
 
 	f, err := ioutil.ReadFile(script)
 	if err != nil {