fixed issue with POWERLEVEL9K_PUBLIC_IP_NONE being empty for real
fixed issue with POWERLEVEL9K_PUBLIC_IP_NONE being empty for real

bhilburn/powerlevel9k,dritter/powerlevel9k,natemccurdy/powerlevel9k,shibumi/powerlevel9k,dritter/powerlevel9k,bhilburn/powerlevel9k,shibumi/powerlevel9k,rjorgenson/powerlevel9k,natemccurdy/powerlevel9k,rjorgenson/powerlevel9k