[Fix #669] Do not use lazy virtualenvwrapper

Lazy virtualenvwrapper completion crashes Zsh.

Signed-off-by: Sorin Ionescu <sorin.ionescu@gmail.com>

modules/python/init.zsh

@@ -35,14 +35,14 @@ if (( ! $+commands[python] && ! $+commands[pyenv] )); then
 fi
 
 # Load virtualenvwrapper into the shell session.
-if (( $+commands[virtualenvwrapper_lazy.sh] )); then
+if (( $+commands[virtualenvwrapper.sh] )); then
   # Set the directory where virtual environments are stored.
   export WORKON_HOME="$HOME/.virtualenvs"
 
   # Disable the virtualenv prompt.
   VIRTUAL_ENV_DISABLE_PROMPT=1
 
-  source "$commands[virtualenvwrapper_lazy.sh]"
+  source "$commands[virtualenvwrapper.sh]"
 fi
 
 #