CORE-19011
Fix a "bug" I introduced in commit 61012eb54.
VideoPortGetAccessRanges() expects the caller to specify at least the
total number of ranges the hardware exposes, otherwise it fails with
ERROR_MORE_DATA. (Tested also with the help of Windows' videoprt.sys.)
On real original XBOX there are three:
```
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation NV2A [XGPU] [10de:02a0] (rev a1)
Subsystem: Unknown [0000:0000]
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 03
Memory at fd000000 (32-bit, non-prefetchable) [size=16M]
Memory at f0000000 (32-bit, prefetchable) [size=128M]
Memory at 00000000 (32-bit, prefetchable) [size=512K]
```
Thanks to Stanislav and Daniel for tests on the real XBOX.
61c77d1f87