ignore handling optional field meta (go-mysql-org#344)

Author: siddontang

replication/row_event.go

@@ -81,11 +81,14 @@ func (e *TableMapEvent) Decode(data []byte) error {
 
 pos += n
 
-if len(data[pos:]) != bitmapByteSize(int(e.ColumnCount)) {
+nullBitmapSize := bitmapByteSize(int(e.ColumnCount))
+if len(data[pos:]) < nullBitmapSize {
 return io.EOF
 }
 
-e.NullBitmap = data[pos:]
+e.NullBitmap = data[pos : pos+nullBitmapSize]
+
+// TODO: handle optional field meta
 
 return nil
 }