fix golint issues, else blocks (#457)

core/stores/sqlx/sqlconn.go

@@ -101,14 +101,15 @@ func (db *commonSqlConn) Prepare(query string) (stmt StmtSession, err error) {
 			return err
 		}
 
-		if st, err := conn.Prepare(query); err != nil {
+		st, err := conn.Prepare(query)
+		if err != nil {
 			return err
-		} else {
-			stmt = statement{
-				stmt: st,
-			}
-			return nil
 		}
+
+		stmt = statement{
+			stmt: st,
+		}
+		return nil
 	}, db.acceptable)
 
 	return
@@ -148,9 +149,9 @@ func (db *commonSqlConn) acceptable(err error) bool {
 	ok := err == nil || err == sql.ErrNoRows || err == sql.ErrTxDone
 	if db.accept == nil {
 		return ok
-	} else {
-		return ok || db.accept(err)
 	}
+
+	return ok || db.accept(err)
 }
 
 func (db *commonSqlConn) queryRows(scanner func(*sql.Rows) error, q string, args ...interface{}) error {