problem with assert statement in ustring.hxx

[Markus Mohrhard]

Hey,

I'm currently running the calc files throough the automatic import
test and the first XLSX file that crashed was novell#349591.

THe problem there is the assert statement in ustring.hxx:232 together
with the vmldrawing.cxx:59.

Is it correct that we can't handle \0 in a string literal or is the
assert statement wrong?

Regards,
Markus