vim-patch:7.4.467: Avoid a problem with unwanted linebreaks in block mode

vim-patch:7.4.467

Avoid a problem with unwanted linebreaks in block mode

https://code.google.com/p/vim/source/detail?r=v7-4-467
vim-patch:7.4.472: Only draw "precedes" entry in 'listchar' when 'list' is on

vim-patch:7.4.472

Problem:    The "precedes" entry in 'listchar' will be drawn when
'showbreak is set and list is not.
Solution:   Only draw this character when 'list' is on. (Christian
Brabandt)
vim-patch:7.4.473

vim-patch:7.4.473

Problem:    Cursor movement is incorrect when there is a number
            column/sign/fold column and 'sbr' is displayed.
Solution:   Adjust the column for 'sbr'. (Christian Brabandt)

https://code.google.com/p/vim/source/detail?r=v7-4-473
vim-patch:7.4.478: Use character lenght for 'showbreak'

vim-patch:7.4.478

Problem:    Using byte length instead of character length for
'showbreak'.
Solution:   Compute the character length. (Marco Hinz)

https://code.google.com/p/vim/source/detail?r=v7-4-478