Fixes an issue when using zplug with multiple zsh installs, where parent zsh instances would propogate an incorrect FPATH to child instances, breaking functions. A way to see if this is verified is to run bash from zsh, and see if you can see the FPATH variable. If you can, there is an issue. The way I stumbled across this is by using bedrock linux, which lets me run zsh from multiple distros.

I did some limited testing with the syntax highlighting plugin and I found no issues. Let me know if you are exporting this for a reason, and I'll try to find another solution. zpm seems to work fine without exporting this variable.