Description:

When trying to load a module with `zmodload`, the path used is incorrect, resulting in an error, and the module is not loaded.

Additional info:
* zsh 5.0.7

Steps to reproduce:
1. launch zsh (`zsh`);
2. try to load a module (let say datetime): `zmodload datetime`;

The error returned is: `zsh: failed to load module `datetime': /usr/lib/zsh/5.0.7/datetime.so: cannot open shared object file: No such file or directory`.

However, we can check that the modules are actually stored in `/usr/lib/zsh/5.0.7/zsh`.

Either zsh should be searching for the modules in the nested path, or the modules should be put 1 level higher.