types: typedef long_u as uintptr_t #961

As discussed here: https://github.com/neovim/neovim/pull/941/files#r15026398
coverity/62610: Remove dead code from setfname()
vim-patch:7.4.331

Problem:    Relative numbering not updated after a linewise yank.  Issue
235.
Solution:   Redraw after the yank. (Christian Brabandt)

https://code.google.com/p/vim/source/detail?r=6d984caa0409fd284722c44cb09a0a2b5360bd4f