tty in non-echo state when running fwts -t . madt

[Colin Ian King]

When reading in dumped binary ACPI tables the command fwts -t . madt leaves the tty in a non-echo mode because of a segfault

[Colin Ian King (colin-king)]

fwts -t . madt -
Results generated by fwts: Version V19.03.00 (2019-03-20 07:36:32).

Some of this work - Copyright (c) 1999 - 2019, Intel Corp. All rights reserved.
Some of this work - Copyright (c) 2010 - 2019, Canonical.
Some of this work - Copyright (c) 2016 - 2019, IBM.
Some of this work - Copyright (c) 2017 - 2019, ARM Ltd.

This test run on 15/05/19 at 10:41:10 on host Linux lenovo 5.0.0-13-generic #14-Ubuntu SMP Mon Apr 15 14:59
:14 UTC 2019 x86_64.

Command: "fwts -t . madt -".
Running tests: madt.

madt: MADT Multiple APIC Description Table (spec compliant).
-------------------------------------------------------------------------------------------------------------

Caught SIGNAL 11 (Segmentation fault), aborting.
Backtrace:
0x00007f1b09c64064 /usr/lib/fwts/libfwts.so.1(+0x17064)
0x00007f1b09a8af60 /lib/x86_64-linux-gnu/libc.so.6(+0x43f60)
0x00007f1b09d0eae4 /usr/lib/fwts/libfwtsacpica.so.1(AcpiTbChecksum+0x14)
0x00007f1b09d0eb19 /usr/lib/fwts/libfwtsacpica.so.1(AcpiTbVerifyChecksum+0x19)
0x00007f1b09d0b3bc /usr/lib/fwts/libfwtsacpica.so.1(AcpiTbVerifyTempTable+0xcc)
0x00007f1b09d0ccf2 /usr/lib/fwts/libfwtsacpica.so.1(AcpiTbInstallStandardTable+0x92)
0x00007f1b09d0d1a6 /usr/lib/fwts/libfwtsacpica.so.1(AcpiTbParseRootTable+0x156)
0x00007f1b09d0d5d8 /usr/lib/fwts/libfwtsacpica.so.1(AcpiInitializeTables+0x68)
0x00007f1b09cc29e1 /usr/lib/fwts/libfwtsacpica.so.1(fwts_acpica_init+0x6b1)
0x000055f1438bec39 fwts(+0x3cc39)
0x00007f1b09c69b47 /usr/lib/fwts/libfwts.so.1(+0x1cb47)
0x00007f1b09c6b8ac /usr/lib/fwts/libfwts.so.1(fwts_framework_args+0x7ec)
0x000055f14389e26a fwts(+0x1c26a)
0x00007f1b09a6db6b /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb)
0x000055f14389f57a fwts(+0x1d57a)

[Colin Ian King (colin-king)]

Fix sent to mailing list for review