OSL: the bogus event group code appears to be unused aside from the os_EvGrpInit() call in os_Initialize(), so let's table it aside for now, and thus spare the boatload of compiler warnings.

#include <stdarg.h>

extern void putchar();

int
printf(char *fmt, ...)
{
	va_list ap;
	int len;

	va_start(ap, fmt);
	len = _doprnt(fmt, ap, &putchar);
	va_end(ap);
	return(len);
}