cdvdgigaherz: Fix Dual layer DVD layer 1 read

ReadFile reports that the DVD is reading from the end of file when
attempting to read any layer 1 sectors.

Use the FSCTL_ALLOW_EXTENDED_DASD_IO ioctl to prevent the file system
driver from carrying out boundary checks.

plugins/cdvdGigaherz/src/Windows/IOCtlSrc.cpp

@@ -297,6 +297,8 @@ s32 IOCtlSrc::Reopen()
 		if(device==INVALID_HANDLE_VALUE)
 			return -1;
 	}
+	// Dual layer DVDs cannot read from layer 1 without this ioctl
+	DeviceIoControl(device, FSCTL_ALLOW_EXTENDED_DASD_IO, nullptr, 0, nullptr, 0, &size, nullptr);
 
 	sessID=0;
 	DeviceIoControl(device,IOCTL_DVD_START_SESSION,NULL,0,&sessID,sizeof(DVD_SESSION_ID), &size, NULL);