patch 7.4.704 Problem: Searching for a character matches an illegal byte and causes invalid memory access. (Dominique Pelle) Solution: Do not match an invalid byte when search for a character in a string. Fix equivalence classes using negative numbers, which result in illegal bytes.

# A very (if not the most) simplistic Makefile for OS/2

CC=gcc
CFLAGS=-O2 -fno-strength-reduce

tee.exe: tee.o
	$(CC) $(CFLAGS) -s -o $@ $<

tee.o: tee.c
	$(CC) $(CFLAGS) -c $<

clean:
	- del tee.o
	- del tee.exe