long lines should be "Error80" not "Todo"

This helped with turning on/off long line highlighting

Signed-off-by: Jeremy C. Andrus <jeremya@cs.columbia.edu>
Merge branch 'master' of github.com:afrojer/vim-config
Add Cocoa/ObjC syntax plugin

Signed-off-by: Jeremy C. Andrus <jeremya@cs.columbia.edu>