Bug in case of consecutive generations

[porquet]

If the user requires two generations, ie for MutekH and MutekS:

m.generate(MutekS())
m.generate(MutekH())

Then the second does not succeed. Note that both work in case they are specified alone. The generation error looks like:

Traceback (most recent call last):
  File "./mjpeg.py", line 60, in <module>
    m.generate(MutekH())
  File "/home/joel/projects/dsx/lib/python/dsx/ware.py", line 169, in generate
    d.drive(self, **kwargs)
  File "/home/joel/projects/dsx/lib/python/dsx/mapper/driver.py", line 98, in drive
    rom = m.final_hard[m.code_section_name]
  File "/home/joel/projects/dsx/lib/python/dsx/ware.py", line 94, in __getitem__
    return self.__nodes_per_name[name]
KeyError: 'cram1'