rem: if (iface[i] == '\0')
add: if (iface[i] != '\0')
context: print_iface(char letter, const char *iface, const unsigned char *mask,	    int invert){	unsigned int i;	if (mask[0] == 0)		return;	printf("-%c %s", letter, invert ? "! " : "");	for (i = 0; i < IFNAMSIZ; i++) {		if (mask[i] != 0) {			if (iface[i] != '\0')				printf("%c", iface[i]);		} else {			if (iface[i] == '\0')				printf("+");			break;		}	}	printf(" ");}