vim-patch:7.4.349

Problem:    When there are matches to highlight the whole window is redrawn,
            which is slow.
Solution:   Only redraw everything when lines were inserted or deleted.
            Reset b_mod_xlines when needed.  (Alexey Radkov)

https://code.google.com/p/vim/source/detail?r=v7-4-349
Merge pull request #1161 from atwupack/vp-7.4.349

vim-patch:7.4.349