ambx133 - Only first embedded lha is extracted

[einstein95]

When running py -m biostools -x roms on https://github.com/86Box/roms/raw/master/machines/ambx133/mkbx2vg2.bin, only the first embedded lha archive which contains original.tm1 is extracted.

Output with -d:

Fixing up directory 1: chown chmod 
Starting extraction on directory 1
1/mkbx2vg2.bin => ArchiveExtractor
Fixing up directory 2: chown chmod 
Starting extraction on directory 2
BIOSExtractor: Extraction produced no files: roms/2/mkbx2vg2.bin:/original.tm1
Fixing up directory 3: chown chmod 
Starting extraction on directory 3
Merging directories: 1 2 

The unextracted files:

ACPITBL.BIN
ANTI_VIR.BIN
AwardBmp.bmp
awardext.rom
CPUCODE.BIN
NNOPROM.BIN
original.tmp
ROSUPD.BIN