[RFC] vim-patch:7.4.288

Merging vim-patch:7.4.288

Problem:    When 'spellfile' is set the screen is not redrawn.
Solution:   Redraw when updating the spelling info. (Christian Brabandt)

https://code.google.com/p/vim/source/detail?r=7965cb6a435ae1ea331c7c2f8740d3d4c3625f3b