vim-patch:7.4.383

Problem:    Bad interaction between preview window and omnifunc.
Solution:   Avoid redrawing the status line. (Hirohito Higashi)

https://code.google.com/p/vim/source/detail?r=v7-4-383
Merge pull request #1193 from Shougo/vim-patch-7.4.383

vim-patch:7.4.383