[PATCH] Shouldn't jump to last position for commit messages (e.g. git)

[henrik]

If you use Vim as your GIT_EDITOR and write a multiline commit message, the next commit message you write may put the caret at e.g. line 3 instead of line 1.

Fixed this in my repo based on (but not forked from) Janus: henrik/dotfiles@6167bf3

Based on code from https://github.com/akitaonrails/vimfiles/blob/master/vimrc#L367