Fix bug #72293 - Heap overflow in mysqlnd related to BIT fields
php_mysqlnd_net_field_length(zend_uchar **packet)
{
	register zend_uchar *p= (zend_uchar *)*packet;

	if (*p < 251) {
		(*packet)++;
		return (unsigned long) *p;
	}

	switch (*p) {
		case 251:
			(*packet)++;
			return MYSQLND_NULL_LENGTH;
		case 252:
			(*packet) += 3;
			return (unsigned long) uint2korr(p+1);
		case 253:
			(*packet) += 4;
			return (unsigned long) uint3korr(p+1);
		default:
			(*packet) += 9;
			return (unsigned long) uint4korr(p+1);
	}
}

php_mysqlnd_net_field_length(zend_uchar **packet)
{
	register zend_uchar *p= (zend_uchar *)*packet;

	if (*p < 251) {
		(*packet)++;
		return (unsigned long) *p;
	}

	switch (*p) {
		case 251:
			(*packet)++;
			return MYSQLND_NULL_LENGTH;
		case 252:
			(*packet) += 3;
			return (unsigned long) uint2korr(p+1);
		case 253:
			(*packet) += 4;
			return (unsigned long) uint3korr(p+1);
		default:
			(*packet) += 9;
			return (unsigned long) uint4korr(p+1);
	}
}
