Variant of patch #697613: don't exit the interpreter on a SystemExit exception if the -i command line option or PYTHONINSPECT environment variable is given, but break into the interactive interpreter just like on other exceptions or normal program exit. (backport)

#include "Python.h"

#ifndef PLATFORM
#define PLATFORM "unknown"
#endif

const char *
Py_GetPlatform(void)
{
	return PLATFORM;
}