Correctly set VCS dirty status on first invocation.
Correctly set VCS dirty status on first invocation.

The precmd hook seems to not get called on first invocation, and gets
called recursively for every subsequent invocation.

zer4tul/dotfiles,bhilburn/powerlevel9k,rjorgenson/powerlevel9k,andjscott/powerlevel9k,dritter/powerlevel9k,shibumi/powerlevel9k,zer4tul/dotfiles,dritter/powerlevel9k,shibumi/powerlevel9k,rjorgenson/powerlevel9k,andjscott/powerlevel9k,natemccurdy/powerlevel9k,MarvinTeichmann/powerlevel9k,natemccurdy/powerlevel9k,bhilburn/powerlevel9k,MarvinTeichmann/powerlevel9k