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isa: check get_card_device before using (nw)

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cracyc 2016-07-28 10:51:40 -05:00
parent e501805f0f
commit 24900f631c
1 changed files with 1 additions and 1 deletions
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2
src/devices/bus/isa/isa.cpp
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@ -52,7 +52,7 @@ void isa8_slot_device::device_start()
{
device_isa8_card_interface *dev = dynamic_cast<device_isa8_card_interface *>(get_card_device());
const device_isa16_card_interface *intf;
if (get_card_device()->interface(intf))
if (get_card_device() && get_card_device()->interface(intf))
fatalerror("ISA16 device in ISA8 slot\n");
if (dev) device_isa8_card_interface::static_set_isabus(*dev,m_owner->subdevice(m_isa_tag));