vim-patch:7.4.577

Problem:    Matching with a virtual column has a lot of overhead on very long
            lines. (Issue 310)
Solution:   Bail out early if there can't be a match. (Christian Brabandt)
            Also check for CTRL-C at every position.

https://github.com/vim/vim/commit/v7-4-577

See also https://code.google.com/p/vim/issues/detail?id=310

Slightly adapted due to the long_u refactoring in
2ceb1c74d5.

src/nvim/version.c

@@ -206,7 +206,7 @@ static int included_patches[] = {
   580,
   //579,
   578,
-  //577,
+  577,
   576,
   //575,
   574,