Handle errors when generating a warning. The value is always written to the returned pointer if getting it was successful, even if a warning causes an error. (This probably doesn't matter as the caller will probably discard the value.) Will backport.

#include "Python.h"

#ifndef PLATFORM
#define PLATFORM "unknown"
#endif

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