On import, check if the target module is initialized before initializing the module and its parents.
On import, check if the target module is initialized before initializing the module and its parents.


git-svn-id: 6db40d0534cac73ba019dccfebee869402ecad0c@937 7a2bd370-bda8-463c-979e-2900ccfb811e

certik/pyjamas,andreyvit/pyjamas,certik/pyjamas,certik/pyjamas,andreyvit/pyjamas,andreyvit/pyjamas,certik/pyjamas,andreyvit/pyjamas