Better error handling during "inspect" patching.
Better error handling during "inspect" patching.

* The "site" module need not exist.

* Proper error exit, if "inspect" cannot be loaded. Does only occur in cases
  of other bugs, but then it's ugly to simply segfault.

wfxiang08/Nuitka,kayhayen/Nuitka,wfxiang08/Nuitka,wfxiang08/Nuitka,kayhayen/Nuitka,tempbottle/Nuitka,kayhayen/Nuitka,tempbottle/Nuitka,tempbottle/Nuitka,kayhayen/Nuitka,tempbottle/Nuitka,wfxiang08/Nuitka