vim-patch:7.4.392

Problem:    Not easy to detect type of command line window.
Solution:   Add the getcmdwintype() function. (Jacob Niehus)

https://code.google.com/p/vim/source/detail?r=v7-4-392
Merge pull request #1197 from Shougo/vim-patch-7.4.392

vim-patch:7.4.392