Bash prompt "namespace" issue

Hi,

Commit 59d3924fb (prompt: fix missing file errors in zsh) added the  
helper function eread() to git-prompt.sh.  That function should be in  
the git "namespace", i.e. prefixed with __git_, otherwise it might  
collide with a function of the same name in the user's environment.

It's already in master and I don't have the means to send a patch  
fixing this ATM, sorry.

Best,
Gábor