main: Fix end of buffer check for path_prefix with non-null PREBUFFER
main: Fix end of buffer check for path_prefix with non-null PREBUFFER

P71/zsh-syntax-highlighting,x-way/zsh-syntax-highlighting,joshuarubin/dotfiles,x-way/zsh-syntax-highlighting,joshuarubin/dotfiles,stuha/wbr-zsh,joshuarubin/dotfiles,zsh-users/zsh-syntax-highlighting,zsh-users/zsh-syntax-highlighting,P71/zsh-syntax-highlighting,phy1729/zsh-syntax-highlighting,phy1729/zsh-syntax-highlighting,joshuarubin/dotfiles