Abbreviations, that contain 0x80 do not work

see https://groups.google.com/d/msg/vim_dev/NXD42_3a8Jw/rFzhZJo_jBgJ
Fix a bug with linebreak set and visual block mode

see: https://groups.google.com/d/msg/vim_dev/FUjx06xTM60/KEm8vfikBvoJ