Merge pull request #116 from c2h5oh/empty_int64array

Empty int64array should not result in scan error

util/sqlutil/scanner.go

@@ -150,8 +150,9 @@ func (a *Int64Array) Scan(src interface{}) error {
 	}
 
 	s := string(b)[1 : len(b)-1]
-	parts := strings.Split(s, ",")
 	results := make([]int64, 0)
+	if s != "" {
+		parts := strings.Split(s, ",")
 		for _, n := range parts {
 			i, err := strconv.ParseInt(n, 10, 64)
 			if err != nil {
@@ -159,6 +160,7 @@ func (a *Int64Array) Scan(src interface{}) error {
 			}
 			results = append(results, i)
 		}
+	}
 	*a = Int64Array(results)
 	return nil
 }