Patch by Mark Hammond: * Changes to a recent patch by Chris Tismer to errors.c. Chris' patch always used FormatMessage() to get the error message passing the error code from errno - but errno and FormatMessage use a different numbering scheme. The main reason the patch looked OK was that ENOFILE==ERROR_FILE_NOT_FOUND - but that is about the only shared error code :-). The MS CRT docs tell you to use _sys_errlist()/_sys_nerr. My patch does also this, and adds a very similar function specifically for win32 error codes.