while (p = strchr(p, ',')) 
while ((p = strchr(p, ',')) != NULL) 
static inline int parse_opt_Q(const char *arg){	const char *p = arg;		if (strchr(arg, 't'))		/* backward compatibility */		return parse_opt_Q1(arg);	if (set_channel_flag(&quietchannels, atoi(arg), "Quiet channel"))		return 1;	while (p = strchr(p, ','))		if (set_channel_flag(&quietchannels, atoi(++p), "Quiet channel"))			return 1;	return 0;}
4357	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4357/64c3a98e5ef08ab323c2ea983ca497f2df9f9db2/timidity.c/buggy/timidity/timidity.c